diff --git a/client/src/components/reservation/ReservationV4TaskCardFieldRenderer.vue b/client/src/components/reservation/ReservationV4TaskCardFieldRenderer.vue
index 4eec203..cf39c86 100644
--- a/client/src/components/reservation/ReservationV4TaskCardFieldRenderer.vue
+++ b/client/src/components/reservation/ReservationV4TaskCardFieldRenderer.vue
@@ -439,6 +439,13 @@ function isSelectControl(field: ReservationV4TaskCardFieldResult): boolean {
 }
 
 function fixedFieldOptions(field: ReservationV4TaskCardFieldResult): FieldOption[] {
+  const backendOptions = (field.fixed_options ?? []).map((option) => ({
+    value: option.value,
+    label: option.label || option.value,
+  }))
+  if (backendOptions.length) {
+    return backendOptions
+  }
   const optionsSource = normalizeControlType(field.options_source)
   if (optionsSource !== 'RESERVATION_V4_GROUP_BOOKING_STATUS_FIXED') {
     return []
diff --git a/client/src/components/reservation/ReservationV4TaskCardSection.vue b/client/src/components/reservation/ReservationV4TaskCardSection.vue
index 5851ae5..d6d4f3a 100644
--- a/client/src/components/reservation/ReservationV4TaskCardSection.vue
+++ b/client/src/components/reservation/ReservationV4TaskCardSection.vue
@@ -58,6 +58,16 @@
         :card="card"
         :source-message-id="sourceMessageId"
       />
+      <ReservationV4TraceCard
+        v-else-if="isTraceCard"
+        :card="card"
+        :model-value="modelValue"
+        :read-only="readOnly"
+        :editable-keys="editableKeys"
+        :validation-errors="validationErrors"
+        :hotel-id="hotelId"
+        @update:model-value="emit('update:modelValue', $event)"
+      />
       <ReservationV4TaskCardFieldRenderer
         v-else
         class="task-card-section__fields"
@@ -72,7 +82,7 @@
     </template>
 
     <details
-      v-if="!isRoomInformationCard && !isRoomingListCard && safePayloadRows.length"
+      v-if="!isRoomInformationCard && !isRoomingListCard && !isTraceCard && safePayloadRows.length"
       class="safe-payload"
     >
       <summary>
@@ -124,6 +134,7 @@
       <label>
         <span>{{ t('taskV4.reviewReason') }}</span>
         <textarea
+          name="v4_review_reason"
           :value="reviewForm.reason"
           :placeholder="t('taskV4.reviewReasonPlaceholder')"
           rows="3"
@@ -182,6 +193,7 @@ import ReservationV4PaymentAttachmentPreview from '@/components/reservation/Rese
 import ReservationV4RoomInformationCard from '@/components/reservation/ReservationV4RoomInformationCard.vue'
 import ReservationV4RoomingListCard from '@/components/reservation/ReservationV4RoomingListCard.vue'
 import ReservationV4TaskCardFieldRenderer from '@/components/reservation/ReservationV4TaskCardFieldRenderer.vue'
+import ReservationV4TraceCard from '@/components/reservation/ReservationV4TraceCard.vue'
 import type { ReservationRecord, ReservationV4TaskCardResult } from '@/types/reservation'
 import { formatReservationReadonlyReason } from '@/utils/reservationDisplay'
 import {
@@ -242,6 +254,7 @@ const { t } = useI18n()
 const isRoomInformationCard = computed(() => props.card.card_type === 'ROOM_INFORMATION')
 const isPaymentCard = computed(() => props.card.card_type === 'PAYMENT')
 const isRoomingListCard = computed(() => props.card.card_type === 'ROOMING_LIST')
+const isTraceCard = computed(() => props.card.card_type === 'TRACE_RESERVATION_NOTES')
 const visibleFields = computed(() =>
   isPaymentCard.value
     ? props.card.fields.filter((field) => !isPaymentAttachmentIdField(field))
diff --git a/client/src/components/reservation/ReservationV4TraceCard.vue b/client/src/components/reservation/ReservationV4TraceCard.vue
new file mode 100644
index 0000000..68625ae
--- /dev/null
+++ b/client/src/components/reservation/ReservationV4TraceCard.vue
@@ -0,0 +1,543 @@
+<template>
+  <section
+    class="trace-card"
+    data-testid="trace-card"
+  >
+    <article
+      v-for="item in traceItems"
+      :key="item.index"
+      class="trace-item"
+    >
+      <header class="trace-item__header">
+        <span>{{ t('taskV4.trace.itemLabel', { index: item.index + 1 }) }}</span>
+        <strong>{{ item.type === 'EXTRA_BED' ? t('taskV4.trace.extraBedTitle') : t('taskV4.trace.generalTitle') }}</strong>
+      </header>
+
+      <div
+        v-if="item.type === 'EXTRA_BED'"
+        class="trace-item__action"
+      >
+        <span>{{ t('taskV4.trace.action') }}</span>
+        <strong>SET EXTRA BED</strong>
+      </div>
+
+      <div class="trace-item__fields">
+        <label
+          v-for="field in fieldsForItem(item)"
+          :key="fieldKey(field)"
+          class="trace-field"
+          :class="{ 'trace-field--readonly': !isEditable(field) }"
+        >
+          <span class="trace-field__label">
+            {{ field.display_name }}
+            <sup v-if="field.required">*</sup>
+            <em v-if="!isEditable(field)">{{ t('taskV4.field.readonly') }}</em>
+          </span>
+
+          <select
+            v-if="isEditable(field) && isSelectField(field)"
+            class="trace-field__control"
+            :name="fieldKey(field)"
+            :aria-invalid="visibleFieldErrors(field).length ? 'true' : 'false'"
+            :disabled="selectDisabled(field)"
+            :value="fieldValue(field)"
+            @change="updateField(field, $event)"
+          >
+            <option value="">{{ t('taskV4.field.selectPlaceholder') }}</option>
+            <option
+              v-for="option in fieldOptions(field)"
+              :key="option.value"
+              :value="option.value"
+            >
+              {{ option.label }}
+            </option>
+          </select>
+
+          <textarea
+            v-else-if="isEditable(field) && isTextField(field)"
+            class="trace-field__control trace-field__control--textarea"
+            :name="fieldKey(field)"
+            :aria-invalid="visibleFieldErrors(field).length ? 'true' : 'false'"
+            :value="fieldValue(field)"
+            rows="3"
+            @input="updateField(field, $event)"
+          />
+
+          <input
+            v-else-if="isEditable(field) && isPositiveIntegerField(field)"
+            class="trace-field__control"
+            type="number"
+            min="1"
+            step="1"
+            inputmode="numeric"
+            :name="fieldKey(field)"
+            :aria-invalid="visibleFieldErrors(field).length ? 'true' : 'false'"
+            :value="fieldValue(field)"
+            @input="updateField(field, $event)"
+          >
+
+          <input
+            v-else-if="isEditable(field)"
+            class="trace-field__control"
+            type="text"
+            :name="fieldKey(field)"
+            :aria-invalid="visibleFieldErrors(field).length ? 'true' : 'false'"
+            :value="fieldValue(field)"
+            @input="updateField(field, $event)"
+          >
+
+          <span
+            v-else
+            class="trace-field__static"
+          >
+            {{ staticFieldValue(field) }}
+          </span>
+
+          <small
+            v-if="field.control_hint"
+            class="trace-field__hint"
+          >{{ field.control_hint }}</small>
+          <small
+            v-for="hint in lookupHints(field)"
+            :key="hint"
+            class="trace-field__hint"
+          >{{ hint }}</small>
+          <small
+            v-for="error in visibleFieldErrors(field)"
+            :key="error"
+            class="trace-field__error"
+          >{{ error }}</small>
+        </label>
+      </div>
+    </article>
+  </section>
+</template>
+
+<script setup lang="ts">
+import { computed, reactive, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
+
+import { fetchReservationV4RoomTypeLookups } from '@/services/reservationService'
+import type {
+  ReservationRecord,
+  ReservationV4CatalogLookupItem,
+  ReservationV4CatalogLookupResult,
+  ReservationV4TaskCardFieldResult,
+  ReservationV4TaskCardResult,
+} from '@/types/reservation'
+import {
+  isReservationV4EditableField,
+  isReservationV4TraceSafeField,
+  fieldPathToPointer,
+  readV4FieldValue,
+  reservationV4FieldKey,
+  reservationV4LookupKindForOptionsSource,
+  stringifyReservationV4SafeDisplayValue,
+} from '@/utils/reservationV4FieldRules'
+
+type TraceItemType = 'GENERAL' | 'EXTRA_BED'
+type TraceItem = {
+  index: number
+  type: TraceItemType
+}
+type FieldOption = {
+  value: string
+  label: string
+}
+
+const props = defineProps<{
+  card: ReservationV4TaskCardResult
+  modelValue: ReservationRecord
+  readOnly: boolean
+  editableKeys: string[]
+  validationErrors?: Record<string, string>
+  hotelId?: string
+}>()
+
+const emit = defineEmits<{
+  'update:modelValue': [value: ReservationRecord]
+}>()
+
+const { t } = useI18n()
+const roomTypeLookup = reactive<{
+  loading: boolean
+  error: string
+  result: ReservationV4CatalogLookupResult | null
+}>({
+  loading: false,
+  error: '',
+  result: null,
+})
+let roomTypeLookupRequestVersion = 0
+
+const traceFields = computed(() => props.card.fields.filter(isReservationV4TraceSafeField))
+const hasRoomTypeLookupField = computed(() =>
+  traceFields.value.some((field) => reservationV4LookupKindForOptionsSource(field.options_source) === 'ROOM_TYPE'),
+)
+const traceItems = computed<TraceItem[]>(() => {
+  const itemIndexes = [...new Set(traceFields.value.map(fieldIndex).filter((index) => index >= 0))]
+  return itemIndexes.sort((left, right) => left - right).map((index) => ({
+    index,
+    type: traceItemType(index),
+  }))
+})
+
+watch(
+  [hasRoomTypeLookupField, () => props.hotelId],
+  () => {
+    if (hasRoomTypeLookupField.value) {
+      void loadRoomTypeLookup()
+    } else {
+      roomTypeLookupRequestVersion += 1
+      roomTypeLookup.loading = false
+      roomTypeLookup.error = ''
+      roomTypeLookup.result = null
+    }
+  },
+  { immediate: true },
+)
+
+function fieldsForItem(item: TraceItem): ReservationV4TaskCardFieldResult[] {
+  const preferredOrder = item.type === 'EXTRA_BED'
+    ? ['target_room_type_code', 'extra_bed_room_count', 'department_code']
+    : ['text', 'department_code']
+  return preferredOrder
+    .map((suffix) => traceFields.value.find((field) => fieldPointer(field) === `/trace_items/${item.index}/${suffix}`))
+    .filter((field): field is ReservationV4TaskCardFieldResult => Boolean(field))
+}
+
+function isEditable(field: ReservationV4TaskCardFieldResult): boolean {
+  const key = fieldKey(field)
+  return !props.readOnly &&
+    props.editableKeys.includes(key) &&
+    isReservationV4EditableField(field)
+}
+
+function isSelectField(field: ReservationV4TaskCardFieldResult): boolean {
+  return fixedFieldOptions(field).length > 0 ||
+    isDepartmentField(field) ||
+    reservationV4LookupKindForOptionsSource(field.options_source) === 'ROOM_TYPE'
+}
+
+function isTextField(field: ReservationV4TaskCardFieldResult): boolean {
+  return fieldPointer(field).endsWith('/text')
+}
+
+function isPositiveIntegerField(field: ReservationV4TaskCardFieldResult): boolean {
+  return fieldPointer(field).endsWith('/extra_bed_room_count')
+}
+
+function isDepartmentField(field: ReservationV4TaskCardFieldResult): boolean {
+  return fieldPointer(field).endsWith('/department_code')
+}
+
+function fieldKey(field: ReservationV4TaskCardFieldResult): string {
+  return reservationV4FieldKey(field)
+}
+
+function fieldValue(field: ReservationV4TaskCardFieldResult): string | number {
+  const value = readV4FieldValue(field, props.modelValue)
+  if (typeof value === 'number') {
+    return value
+  }
+  if (typeof value === 'string') {
+    return value
+  }
+  return stringifyValue(value)
+}
+
+function staticFieldValue(field: ReservationV4TaskCardFieldResult): string {
+  const value = String(fieldValue(field))
+  return fieldOptions(field).find((option) => option.value === value)?.label ?? stringifyValue(value)
+}
+
+function fieldOptions(field: ReservationV4TaskCardFieldResult): FieldOption[] {
+  if (reservationV4LookupKindForOptionsSource(field.options_source) === 'ROOM_TYPE') {
+    return roomTypeOptions(field)
+  }
+  const options = fixedFieldOptions(field)
+  if (!options.length && isDepartmentField(field)) {
+    const currentValue = String(readV4FieldValue(field, props.modelValue) || '')
+    return currentValue
+      ? [{
+          value: currentValue,
+          label: currentValue,
+        }]
+      : []
+  }
+  return options
+}
+
+function fixedFieldOptions(field: ReservationV4TaskCardFieldResult): FieldOption[] {
+  return (field.fixed_options ?? []).map((option) => ({
+    value: option.value,
+    label: option.label || option.value,
+  }))
+}
+
+function roomTypeOptions(field: ReservationV4TaskCardFieldResult): FieldOption[] {
+  const options = (roomTypeLookup.result?.items ?? []).map((item) => ({
+    value: item.code,
+    label: lookupItemLabel(item),
+  }))
+  const currentValue = String(readV4FieldValue(field, props.modelValue) || '')
+  if (currentValue && !options.some((option) => option.value === currentValue)) {
+    options.push({
+      value: currentValue,
+      label: currentValue,
+    })
+  }
+  return options
+}
+
+function selectDisabled(field: ReservationV4TaskCardFieldResult): boolean {
+  if (isDepartmentField(field)) {
+    return fixedFieldOptions(field).length === 0
+  }
+  return reservationV4LookupKindForOptionsSource(field.options_source) === 'ROOM_TYPE' &&
+    (roomTypeLookup.loading || Boolean(roomTypeLookup.error))
+}
+
+function lookupHints(field: ReservationV4TaskCardFieldResult): string[] {
+  if (reservationV4LookupKindForOptionsSource(field.options_source) !== 'ROOM_TYPE') {
+    return []
+  }
+  if (roomTypeLookup.loading) {
+    return [t('taskV4.lookup.loading')]
+  }
+  if (roomTypeLookup.error) {
+    return [roomTypeLookup.error]
+  }
+  return []
+}
+
+function visibleFieldErrors(field: ReservationV4TaskCardFieldResult): string[] {
+  return [
+    ...(field.validation_errors ?? []),
+    props.validationErrors?.[fieldKey(field)] ?? '',
+  ].filter(Boolean)
+}
+
+function updateField(field: ReservationV4TaskCardFieldResult, event: Event): void {
+  const target = event.target as HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement
+  emit('update:modelValue', {
+    ...props.modelValue,
+    [fieldKey(field)]: inputValue(field, target.value),
+  })
+}
+
+function inputValue(field: ReservationV4TaskCardFieldResult, value: string): string | number {
+  if (!isPositiveIntegerField(field)) {
+    return value
+  }
+  if (value.trim() === '') {
+    return ''
+  }
+  const numericValue = Number(value)
+  return Number.isFinite(numericValue) ? numericValue : value
+}
+
+async function loadRoomTypeLookup(): Promise<void> {
+  const requestVersion = ++roomTypeLookupRequestVersion
+  roomTypeLookup.loading = true
+  roomTypeLookup.error = ''
+  try {
+    const result = await fetchReservationV4RoomTypeLookups({
+      ...(props.hotelId ? { hotel_id: props.hotelId } : {}),
+      page_num: 1,
+      page_size: 100,
+    })
+    if (requestVersion === roomTypeLookupRequestVersion) {
+      roomTypeLookup.result = {
+        ...result,
+        items: result.items ?? [],
+        warnings: result.warnings ?? [],
+      }
+    }
+  } catch {
+    if (requestVersion === roomTypeLookupRequestVersion) {
+      roomTypeLookup.error = t('taskV4.lookup.error')
+    }
+  } finally {
+    if (requestVersion === roomTypeLookupRequestVersion) {
+      roomTypeLookup.loading = false
+    }
+  }
+}
+
+function traceItemType(index: number): TraceItemType {
+  const payloadItem = payloadTraceItem(index)
+  if (readString(payloadItem?.item_type).toUpperCase() === 'EXTRA_BED') {
+    return 'EXTRA_BED'
+  }
+  return traceFields.value.some((field) =>
+    fieldPointer(field) === `/trace_items/${index}/target_room_type_code` ||
+    fieldPointer(field) === `/trace_items/${index}/extra_bed_room_count`,
+  )
+    ? 'EXTRA_BED'
+    : 'GENERAL'
+}
+
+function payloadTraceItem(index: number): ReservationRecord | null {
+  const traceItemsValue = props.card.display_payload?.trace_items
+  if (!Array.isArray(traceItemsValue)) {
+    return null
+  }
+  const item = traceItemsValue[index]
+  return isRecord(item) ? item : null
+}
+
+function fieldIndex(field: ReservationV4TaskCardFieldResult): number {
+  const match = fieldPointer(field).match(/^\/trace_items\/(\d+)\//)
+  return match ? Number(match[1]) : -1
+}
+
+function fieldPointer(field: ReservationV4TaskCardFieldResult): string {
+  return field.field_pointer || fieldPathToPointer(field.field_path)
+}
+
+function lookupItemLabel(item: ReservationV4CatalogLookupItem): string {
+  if (item.display_name && item.display_name !== item.code) {
+    return `${item.code} - ${item.display_name}`
+  }
+  return item.code
+}
+
+function stringifyValue(value: unknown): string {
+  return stringifyReservationV4SafeDisplayValue(
+    value,
+    t('taskV4.field.empty'),
+    t('taskV4.field.hidden'),
+  )
+}
+
+function readString(value: unknown): string {
+  return typeof value === 'string' ? value : ''
+}
+
+function isRecord(value: unknown): value is ReservationRecord {
+  return Boolean(value) && typeof value === 'object' && !Array.isArray(value)
+}
+</script>
+
+<style scoped>
+.trace-card {
+  display: grid;
+  gap: 14px;
+  margin: 0 20px 18px;
+}
+
+.trace-item {
+  display: grid;
+  gap: 14px;
+  border: 1px solid var(--th-color-slate-200);
+  border-radius: var(--th-radius-sm);
+  background: var(--th-color-slate-50);
+  padding: 14px;
+}
+
+.trace-item__header,
+.trace-item__action {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  min-width: 0;
+}
+
+.trace-item__header span,
+.trace-item__action span {
+  color: var(--th-color-blue-600);
+  font-size: 12px;
+  font-weight: 900;
+}
+
+.trace-item__header strong,
+.trace-item__action strong {
+  color: var(--th-color-slate-900);
+  font-size: 14px;
+  overflow-wrap: anywhere;
+}
+
+.trace-item__action {
+  border-radius: var(--th-radius-sm);
+  background: var(--th-color-white);
+  padding: 10px 12px;
+}
+
+.trace-item__fields {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 14px;
+}
+
+.trace-field {
+  display: grid;
+  gap: 7px;
+}
+
+.trace-field__label {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  color: var(--th-color-slate-700);
+  font-size: 12px;
+  font-weight: 800;
+}
+
+.trace-field__label sup {
+  color: var(--th-color-danger);
+}
+
+.trace-field__label em {
+  border-radius: 999px;
+  background: var(--th-color-slate-100);
+  color: var(--th-color-slate-500);
+  font-size: 11px;
+  font-style: normal;
+  padding: 2px 6px;
+}
+
+.trace-field__control,
+.trace-field__static {
+  min-height: 38px;
+  width: 100%;
+  border: 1px solid var(--th-color-slate-200);
+  border-radius: var(--th-radius-sm);
+  background: var(--th-color-white);
+  color: var(--th-color-slate-900);
+  font: inherit;
+  padding: 9px 10px;
+}
+
+.trace-field__control--textarea {
+  resize: vertical;
+}
+
+.trace-field__control[aria-invalid='true'] {
+  border-color: var(--th-color-danger);
+  box-shadow: 0 0 0 3px var(--th-color-danger-bg);
+}
+
+.trace-field__static {
+  display: block;
+  background: var(--th-color-white);
+  overflow-wrap: anywhere;
+}
+
+.trace-field__hint {
+  color: var(--th-color-slate-500);
+  font-size: 12px;
+}
+
+.trace-field__error {
+  color: var(--th-color-danger);
+  font-size: 12px;
+  font-weight: 800;
+}
+
+@media (max-width: 760px) {
+  .trace-item__fields {
+    grid-template-columns: 1fr;
+  }
+}
+</style>
diff --git a/client/src/i18n/locales/en-US.ts b/client/src/i18n/locales/en-US.ts
index a7cf5da..75c57d3 100644
--- a/client/src/i18n/locales/en-US.ts
+++ b/client/src/i18n/locales/en-US.ts
@@ -630,6 +630,13 @@ export default {
       description: 'The current source message contains a Rooming List item that needs manual handling.',
       confirmHint: 'This first version only confirms that the item has been handled manually. Guest details and attachment content are not displayed or processed here.',
     },
+    trace: {
+      title: 'Trace notes',
+      itemLabel: 'Item {index}',
+      generalTitle: 'General note',
+      extraBedTitle: 'Extra bed note',
+      action: 'Fixed action',
+    },
     lookup: {
       loading: 'Loading catalog',
       empty: 'No options in the current catalog. A no-match search does not mean the catalog is uninitialized.',
diff --git a/client/src/i18n/locales/th-TH.ts b/client/src/i18n/locales/th-TH.ts
index f24cba4..a7d3989 100644
--- a/client/src/i18n/locales/th-TH.ts
+++ b/client/src/i18n/locales/th-TH.ts
@@ -630,6 +630,13 @@ export default {
       description: 'ข้อความต้นทางปัจจุบันมีรายการ Rooming List ที่ต้องให้เจ้าหน้าที่จัดการ',
       confirmHint: 'เวอร์ชันแรกนี้ใช้ยืนยันว่ารายการได้รับการจัดการด้วยคนแล้วเท่านั้น ไม่แสดงหรือประมวลผลรายชื่อแขกและเนื้อหาไฟล์แนบในหน้านี้',
     },
+    trace: {
+      title: 'หมายเหตุ Trace',
+      itemLabel: 'รายการ {index}',
+      generalTitle: 'หมายเหตุทั่วไป',
+      extraBedTitle: 'รายการเตียงเสริม',
+      action: 'การดำเนินการคงที่',
+    },
     lookup: {
       loading: 'กำลังโหลดแค็ตตาล็อก',
       empty: 'ไม่มีตัวเลือกในแค็ตตาล็อกปัจจุบัน หากค้นหาไม่พบไม่ได้หมายความว่าแค็ตตาล็อกยังไม่เริ่มต้น',
diff --git a/client/src/i18n/locales/zh-CN.ts b/client/src/i18n/locales/zh-CN.ts
index f1a85b4..59550ef 100644
--- a/client/src/i18n/locales/zh-CN.ts
+++ b/client/src/i18n/locales/zh-CN.ts
@@ -630,6 +630,13 @@ export default {
       description: '当前来源消息包含需要人工处理的 Rooming List 事项，请在酒店内部流程处理后确认该卡片。',
       confirmHint: '第一版仅确认该事项已由人工处理，不展示或处理名单明细和附件内容。',
     },
+    trace: {
+      title: 'Trace / 追踪备注事项',
+      itemLabel: '事项 {index}',
+      generalTitle: '普通事项',
+      extraBedTitle: '加床事项',
+      action: '固定动作',
+    },
     lookup: {
       loading: '目录加载中',
       empty: '当前目录没有可选项；如果是搜索无结果，不代表目录未初始化。',
diff --git a/client/src/tests/reservationV4Views.spec.ts b/client/src/tests/reservationV4Views.spec.ts
index 91d2d00..d136cdb 100644
--- a/client/src/tests/reservationV4Views.spec.ts
+++ b/client/src/tests/reservationV4Views.spec.ts
@@ -104,7 +104,7 @@ describe('reservation V4 pages', () => {
 
   it('keeps V4 task card layout classes for styled card metadata and payload summary', async () => {
     const detail = createOrderTaskDetail()
-    detail.business_cards[0]!.card_type = 'TRACE_RESERVATION_NOTES'
+    detail.business_cards[0]!.card_type = 'VOUCHER'
     detail.business_cards[0]!.display_payload = {
       booking_scenario: 'STANDARD',
       relevant_message_excerpt: 'Please keep this visible.',
@@ -514,6 +514,178 @@ describe('reservation V4 pages', () => {
     expect(JSON.stringify(submittedRequest)).not.toContain('https://oss.example')
   })
 
+  it('renders GENERAL Trace cards with fixed department options and confirms safe trace fields only', async () => {
+    const detail = createOrderTaskDetail()
+    useTraceBusinessCard(detail, 'GENERAL')
+    vi.mocked(service.fetchReservationV4OrderTaskDetail).mockResolvedValue(detail)
+    vi.mocked(service.confirmReservationV4OrderTaskCard).mockResolvedValue({
+      ...detail,
+      business_cards: [
+        {
+          ...detail.business_cards[0]!,
+          card_status: 'CONFIRMED',
+        },
+      ],
+    })
+
+    const wrapper = await mountWithPlugins(
+      ReservationV4OrderTaskDetailView,
+      '/reservation/order-tasks/9001',
+    )
+    await flushPromises()
+
+    const traceSection = wrapper
+      .findAll('.task-card-section')
+      .find((section) => section.find('[data-testid="trace-card"]').exists())
+    expect(traceSection).toBeTruthy()
+    expect((traceSection!.find('textarea[name="/trace_items/0/text"]').element as HTMLTextAreaElement).value)
+      .toBe('Late arrival note')
+    expect(traceSection!.text()).not.toContain('CONTENT_SHOULD_NOT_RENDER')
+    expect(traceSection!.text()).not.toContain('TARGET_ORDER_SHOULD_NOT_RENDER')
+    expect(traceSection!.text()).not.toContain('AI_PAYLOAD_SHOULD_NOT_RENDER')
+    expect(traceSection!.text()).not.toContain('https://oss.example/private/trace.pdf')
+    expect(traceSection!.find('details.safe-payload').exists()).toBe(false)
+
+    const departmentOptions = traceSection!
+      .find('select[name="/trace_items/0/department_code"]')
+      .findAll('option')
+      .map((option) => option.attributes('value'))
+    expect(departmentOptions).toEqual(['', 'FO', 'HSK', 'FO+HSK'])
+
+    await traceSection!.find('textarea[name="/trace_items/0/text"]').setValue('Arrange late arrival follow-up')
+    await traceSection!.find('select[name="/trace_items/0/department_code"]').setValue('HSK')
+    await traceSection!.find('button.primary-button').trigger('click')
+    await flushPromises()
+
+    expect(service.confirmReservationV4OrderTaskCard).toHaveBeenCalledWith('9001', 'card-trace', {
+      version: 10,
+      confirmed_payload: {
+        trace_items: [
+          {
+            text: 'Arrange late arrival follow-up',
+            department_code: 'HSK',
+          },
+        ],
+      },
+    })
+    const submittedRequest = vi.mocked(service.confirmReservationV4OrderTaskCard).mock.calls[0]?.[2]
+    expect(JSON.stringify(submittedRequest)).not.toContain('content')
+    expect(JSON.stringify(submittedRequest)).not.toContain('target_order')
+    expect(JSON.stringify(submittedRequest)).not.toContain('AI_PAYLOAD_SHOULD_NOT_RENDER')
+    expect(JSON.stringify(submittedRequest)).not.toContain('https://oss.example')
+  })
+
+  it('renders EXTRA_BED Trace cards with room type lookup, positive count input and confirms safe fields only', async () => {
+    const detail = createOrderTaskDetail()
+    useTraceBusinessCard(detail, 'EXTRA_BED')
+    vi.mocked(service.fetchReservationV4OrderTaskDetail).mockResolvedValue(detail)
+    vi.mocked(service.confirmReservationV4OrderTaskCard).mockResolvedValue(detail)
+
+    const wrapper = await mountWithPlugins(
+      ReservationV4OrderTaskDetailView,
+      '/reservation/order-tasks/9001',
+    )
+    await flushPromises()
+
+    const traceSection = wrapper
+      .findAll('.task-card-section')
+      .find((section) => section.find('[data-testid="trace-card"]').exists())
+    expect(traceSection).toBeTruthy()
+    expect(traceSection!.text()).toContain('SET EXTRA BED')
+    expect(traceSection!.find('select[name="/trace_items/0/target_room_type_code"]').text()).toContain('TWN - Twin')
+    const roomCountInput = traceSection!.find('input[name="/trace_items/0/extra_bed_room_count"]')
+    expect(roomCountInput.attributes('type')).toBe('number')
+    expect(roomCountInput.attributes('min')).toBe('1')
+    expect(roomCountInput.attributes('step')).toBe('1')
+
+    await traceSection!.find('select[name="/trace_items/0/target_room_type_code"]').setValue('TWN')
+    await roomCountInput.setValue('0')
+    await traceSection!.find('select[name="/trace_items/0/department_code"]').setValue('FO+HSK')
+    await traceSection!.find('button.primary-button').trigger('click')
+    await flushPromises()
+
+    expect(service.confirmReservationV4OrderTaskCard).not.toHaveBeenCalled()
+    expect(traceSection!.text()).toContain('Extra Bed Room Count must be a positive integer')
+
+    await roomCountInput.setValue('2')
+    await traceSection!.find('button.primary-button').trigger('click')
+    await flushPromises()
+
+    expect(service.confirmReservationV4OrderTaskCard).toHaveBeenCalledWith('9001', 'card-trace', {
+      version: 10,
+      confirmed_payload: {
+        trace_items: [
+          {
+            target_room_type_code: 'TWN',
+            extra_bed_room_count: 2,
+            department_code: 'FO+HSK',
+          },
+        ],
+      },
+    })
+    const submittedRequest = vi.mocked(service.confirmReservationV4OrderTaskCard).mock.calls[0]?.[2]
+    expect(JSON.stringify(submittedRequest)).not.toContain('content')
+    expect(JSON.stringify(submittedRequest)).not.toContain('target_order')
+    expect(JSON.stringify(submittedRequest)).not.toContain('https://oss.example')
+  })
+
+  it('resolves REVIEW_REQUIRED Trace cards with field errors and safe review overrides', async () => {
+    const detail = createOrderTaskDetail()
+    useTraceBusinessCard(detail, 'GENERAL', 'REVIEW_REQUIRED')
+    detail.order_task.order_id = 'order-2001'
+    detail.order_task.target_resolution_status = 'RESOLVED'
+    vi.mocked(service.fetchReservationV4OrderTaskDetail).mockResolvedValue(detail)
+    vi.mocked(service.resolveReservationV4OrderTaskCardReview).mockResolvedValue({
+      ...detail,
+      business_cards: [
+        {
+          ...detail.business_cards[0]!,
+          card_status: 'PENDING_CONFIRM',
+          review_status: 'RESOLVED',
+        },
+      ],
+    })
+
+    const wrapper = await mountWithPlugins(
+      ReservationV4OrderTaskDetailView,
+      '/reservation/order-tasks/9001',
+    )
+    await flushPromises()
+
+    const traceSection = wrapper
+      .findAll('.task-card-section')
+      .find((section) => section.find('[data-testid="trace-card"]').exists())
+    expect(traceSection).toBeTruthy()
+    expect(traceSection!.find('.trace-field__error').text()).toContain('Department is required')
+
+    await traceSection!.find('textarea[name="/trace_items/0/text"]').setValue('Confirm trace review text')
+    await traceSection!.find('select[name="/trace_items/0/department_code"]').setValue('FO')
+    await traceSection!.find('textarea[name="v4_review_reason"]').setValue('confirmed trace note')
+    await traceSection!.find('button.primary-button').trigger('click')
+    await flushPromises()
+
+    expect(service.confirmReservationV4OrderTaskCard).not.toHaveBeenCalled()
+    expect(service.resolveReservationV4OrderTaskCardReview).toHaveBeenCalledWith('9001', 'card-trace', {
+      version: 10,
+      confirmed_order_id: 'order-2001',
+      reason: 'confirmed trace note',
+      field_overrides: [
+        {
+          field_pointer: '/trace_items/0/text',
+          value: 'Confirm trace review text',
+        },
+        {
+          field_pointer: '/trace_items/0/department_code',
+          value: 'FO',
+        },
+      ],
+    })
+    const submittedRequest = vi.mocked(service.resolveReservationV4OrderTaskCardReview).mock.calls[0]?.[2]
+    expect(JSON.stringify(submittedRequest)).not.toContain('content')
+    expect(JSON.stringify(submittedRequest)).not.toContain('target_order')
+    expect(JSON.stringify(submittedRequest)).not.toContain('https://oss.example')
+  })
+
   it('renders New Booking Room Information as a business form and confirms stable final values', async () => {
     const detail = createOrderTaskDetail({
       businessEventType: 'NEW_BOOKING',
@@ -1557,6 +1729,124 @@ function useBoundOrder(detail: ReservationV4OrderTaskDetailResult): void {
   }
 }
 
+function useTraceBusinessCard(
+  detail: ReservationV4OrderTaskDetailResult,
+  itemType: 'GENERAL' | 'EXTRA_BED',
+  cardStatus = 'PENDING_CONFIRM',
+): void {
+  const isReviewRequired = cardStatus === 'REVIEW_REQUIRED'
+  detail.business_cards = [
+    createCard('card-trace', 'TRACE_RESERVATION_NOTES', cardStatus, {
+      event_type: 'TRACE_RESERVATION_NOTES',
+      version: 10,
+      availability: createAvailability({
+        confirmable: cardStatus === 'PENDING_CONFIRM',
+        reviewable: isReviewRequired,
+        editable: true,
+        read_only: false,
+      }),
+      display_payload: {
+        trace_items: [
+          itemType === 'EXTRA_BED'
+            ? {
+                item_type: 'EXTRA_BED',
+                target_room_type_code: 'TWN',
+                extra_bed_room_count: 1,
+                department_code: 'FO',
+                content: 'CONTENT_SHOULD_NOT_RENDER',
+              }
+            : {
+                item_type: 'GENERAL',
+                text: 'Late arrival note',
+                department_code: 'FO',
+                content: 'CONTENT_SHOULD_NOT_RENDER',
+              },
+        ],
+        target_order: 'TARGET_ORDER_SHOULD_NOT_RENDER',
+        ai_payload_json: 'AI_PAYLOAD_SHOULD_NOT_RENDER',
+        attachment_url: 'https://oss.example/private/trace.pdf',
+      },
+      fields: itemType === 'EXTRA_BED'
+        ? [
+            createField('/trace_items/0/target_room_type_code', {
+              display_name: 'Target Room Type',
+              value: 'TWN',
+              options_source: 'RESERVATION_V4_ROOM_TYPE_CATALOG',
+              control_type: 'SELECT',
+              edit_scope: isReviewRequired ? 'REVIEW' : 'CONFIRM',
+              write_target: isReviewRequired ? 'REVIEW_RESOLUTION_FIELD_OVERRIDES' : 'CONFIRMED_PAYLOAD_JSON',
+            }),
+            createField('/trace_items/0/extra_bed_room_count', {
+              display_name: 'Extra Bed Room Count',
+              value: 1,
+              control_type: 'NUMBER',
+              edit_scope: isReviewRequired ? 'REVIEW' : 'CONFIRM',
+              write_target: isReviewRequired ? 'REVIEW_RESOLUTION_FIELD_OVERRIDES' : 'CONFIRMED_PAYLOAD_JSON',
+            }),
+            createTraceDepartmentField(isReviewRequired),
+            createField('/trace_items/0/content', {
+              display_name: 'Legacy content',
+              value: 'CONTENT_SHOULD_NOT_RENDER',
+              editable: true,
+              edit_scope: isReviewRequired ? 'REVIEW' : 'CONFIRM',
+              write_target: isReviewRequired ? 'REVIEW_RESOLUTION_FIELD_OVERRIDES' : 'CONFIRMED_PAYLOAD_JSON',
+            }),
+          ]
+        : [
+            createField('/trace_items/0/text', {
+              display_name: 'Trace Text',
+              value: 'Late arrival note',
+              control_type: 'TEXTAREA',
+              edit_scope: isReviewRequired ? 'REVIEW' : 'CONFIRM',
+              write_target: isReviewRequired ? 'REVIEW_RESOLUTION_FIELD_OVERRIDES' : 'CONFIRMED_PAYLOAD_JSON',
+            }),
+            createTraceDepartmentField(isReviewRequired, isReviewRequired ? ['Department is required'] : []),
+            createField('/trace_items/0/content', {
+              display_name: 'Legacy content',
+              value: 'CONTENT_SHOULD_NOT_RENDER',
+              editable: true,
+              edit_scope: isReviewRequired ? 'REVIEW' : 'CONFIRM',
+              write_target: isReviewRequired ? 'REVIEW_RESOLUTION_FIELD_OVERRIDES' : 'CONFIRMED_PAYLOAD_JSON',
+            }),
+          ],
+    }),
+  ]
+  detail.card_counts = {
+    ...detail.card_counts,
+    pending_confirm_count: cardStatus === 'PENDING_CONFIRM' ? 2 : 1,
+    review_required_count: isReviewRequired ? 1 : 0,
+  }
+}
+
+function createTraceDepartmentField(
+  isReviewRequired: boolean,
+  validationErrors: string[] = [],
+): ReservationV4TaskCardResult['fields'][number] {
+  return createField('/trace_items/0/department_code', {
+    display_name: 'Department',
+    value: 'FO',
+    control_type: 'SELECT',
+    options_source: 'reservation_v4_trace_department_fixed',
+    fixed_options: [
+      {
+        value: 'FO',
+        label: 'FO',
+      },
+      {
+        value: 'HSK',
+        label: 'HSK',
+      },
+      {
+        value: 'FO+HSK',
+        label: 'FO+HSK',
+      },
+    ],
+    edit_scope: isReviewRequired ? 'REVIEW' : 'CONFIRM',
+    write_target: isReviewRequired ? 'REVIEW_RESOLUTION_FIELD_OVERRIDES' : 'CONFIRMED_PAYLOAD_JSON',
+    validation_errors: validationErrors,
+  })
+}
+
 function createPaymentConversationMedia(): SourceMessageOriginalMedia[] {
   return [
     {
@@ -1830,6 +2120,7 @@ function createField(
     edit_scope: overrides.edit_scope ?? 'NORMAL_TASK',
     write_target: overrides.write_target ?? 'CONFIRMED_PAYLOAD_JSON',
     options_source: overrides.options_source ?? null,
+    fixed_options: overrides.fixed_options ?? null,
     raw_readonly: overrides.raw_readonly ?? false,
     validation_errors: overrides.validation_errors ?? [],
     control_hint: overrides.control_hint ?? null,
diff --git a/client/src/types/reservation.ts b/client/src/types/reservation.ts
index a584974..a24e09c 100644
--- a/client/src/types/reservation.ts
+++ b/client/src/types/reservation.ts
@@ -358,11 +358,17 @@ export interface ReservationV4TaskCardFieldResult {
   edit_scope: string | null
   write_target: string | null
   options_source: string | null
+  fixed_options?: ReservationV4TaskCardFieldOptionResult[] | null
   raw_readonly: boolean | null
   validation_errors: string[]
   control_hint: string | null
 }
 
+export interface ReservationV4TaskCardFieldOptionResult {
+  value: string
+  label: string | null
+}
+
 export interface ReservationV4RoomInformationRoomItem extends ReservationRecord {
   room_type_code?: string | null
   room_count?: number | string | null
diff --git a/client/src/utils/reservationV4FieldRules.ts b/client/src/utils/reservationV4FieldRules.ts
index 19b4fbe..93d0ebc 100644
--- a/client/src/utils/reservationV4FieldRules.ts
+++ b/client/src/utils/reservationV4FieldRules.ts
@@ -18,8 +18,14 @@ const reviewWriteTargets = new Set([
   'FIELD_OVERRIDES',
 ])
 const readonlyControlTypes = new Set(['READONLY', 'FILE', 'WORKFLOW_STATE', 'STRUCTURED_TABLE'])
-const reviewWritablePointerPrefixes = ['/basic_information/', '/room_information/final_values/', '/business_fields/']
+const reviewWritablePointerPrefixes = [
+  '/basic_information/',
+  '/room_information/final_values/',
+  '/business_fields/',
+  '/trace_items/',
+]
 const roomInformationFieldPrefix = '/room_information/final_values/'
+const traceFieldPattern = /^\/trace_items\/\d+\/(?:text|department_code|target_room_type_code|extra_bed_room_count)$/
 const hiddenDisplayValue = Symbol('reservation-v4-hidden-display-value')
 
 export type ReservationV4FieldErrorMap = Record<string, string>
@@ -43,6 +49,11 @@ export function isReservationV4RoomInformationSafeField(field: ReservationV4Task
   return pointer.startsWith(roomInformationFieldPrefix) && !isForbiddenRoomInformationPointer(pointer)
 }
 
+export function isReservationV4TraceSafeField(field: ReservationV4TaskCardFieldResult): boolean {
+  const pointer = field.field_pointer || fieldPathToPointer(field.field_path)
+  return traceFieldPattern.test(pointer)
+}
+
 export function buildReservationV4ConfirmedPayload(
   fields: ReservationV4TaskCardFieldResult[],
   values: ReservationRecord,
@@ -73,8 +84,13 @@ export function validateReservationV4Fields(
 ): ReservationV4FieldErrorMap {
   return fields.filter(isReservationV4EditableField).reduce<ReservationV4FieldErrorMap>((errors, field) => {
     const key = reservationV4FieldKey(field)
-    if (field.required && isEmptyV4Value(readV4FieldValue(field, values))) {
+    const value = readV4FieldValue(field, values)
+    if (field.required && isEmptyV4Value(value)) {
       errors[key] = `${field.display_name} is required`
+      return errors
+    }
+    if (isTracePositiveIntegerField(field) && !isEmptyV4Value(value) && !isPositiveIntegerValue(value)) {
+      errors[key] = `${field.display_name} must be a positive integer`
     }
     return errors
   }, {})
@@ -383,6 +399,21 @@ function isForbiddenRoomInformationPointer(pointer: string): boolean {
     normalizedPointer.includes('/locator_value')
 }
 
+function isTracePositiveIntegerField(field: ReservationV4TaskCardFieldResult): boolean {
+  const pointer = field.field_pointer || fieldPathToPointer(field.field_path)
+  return /^\/trace_items\/\d+\/extra_bed_room_count$/.test(pointer)
+}
+
+function isPositiveIntegerValue(value: unknown): boolean {
+  if (typeof value === 'number') {
+    return Number.isInteger(value) && value > 0
+  }
+  if (typeof value !== 'string') {
+    return false
+  }
+  return /^[1-9]\d*$/.test(value.trim())
+}
+
 function isUnsafeUrlLikeValue(value: string): boolean {
   const trimmedValue = value.trim()
   return /^(https?:\/\/|oss:\/\/|s3:\/\/)/i.test(trimmedValue)
diff --git a/client/src/views/reservation/ReservationV4OrderTaskDetailView.vue b/client/src/views/reservation/ReservationV4OrderTaskDetailView.vue
index a7eab54..ef153f5 100644
--- a/client/src/views/reservation/ReservationV4OrderTaskDetailView.vue
+++ b/client/src/views/reservation/ReservationV4OrderTaskDetailView.vue
@@ -224,6 +224,7 @@ import {
   isReservationV4ConfirmWritableField,
   isReservationV4RoomInformationSafeField,
   isReservationV4ReviewWritableField,
+  isReservationV4TraceSafeField,
   mapReservationV4BackendDetailsToFields,
   reservationV4FieldKey,
   validateReservationV4Fields,
@@ -468,11 +469,15 @@ function submissionFieldsForCard(card: ReservationV4TaskCardResult): Reservation
   if (isVersionOnlyConfirmCard(card)) {
     return []
   }
-  return card.card_type === 'ROOM_INFORMATION'
-    ? card.fields.filter((field) =>
+  if (card.card_type === 'ROOM_INFORMATION') {
+    return card.fields.filter((field) =>
       isReservationV4RoomInformationSafeField(field) && !isGroupRoomInformationBreakfastField(card, field),
     )
-    : card.fields
+  }
+  if (isTraceCard(card)) {
+    return card.fields.filter(isReservationV4TraceSafeField)
+  }
+  return card.fields
 }
 
 function buildConfirmRequest(
@@ -498,6 +503,10 @@ function isRoomingListCard(card: ReservationV4TaskCardResult): boolean {
   return card.card_type === 'ROOMING_LIST'
 }
 
+function isTraceCard(card: ReservationV4TaskCardResult): boolean {
+  return card.card_type === 'TRACE_RESERVATION_NOTES'
+}
+
 function isVersionOnlyConfirmCard(card: ReservationV4TaskCardResult): boolean {
   return isPaymentCard(card) || isRoomingListCard(card)
 }
@@ -538,6 +547,9 @@ function cardTitle(card: ReservationV4TaskCardResult): string {
   if (isRoomingListCard(card)) {
     return t('taskV4.roomingList.title')
   }
+  if (isTraceCard(card)) {
+    return t('taskV4.trace.title')
+  }
   return formatReservationTaskCard(t, card.card_type)
 }