diff --git a/apps/api/prisma/migrations/20261005180000_person_previous_source/migration.sql b/apps/api/prisma/migrations/20261005180000_person_previous_source/migration.sql
new file mode 100644
index 0000000..b0b32b2
--- /dev/null
+++ b/apps/api/prisma/migrations/20261005180000_person_previous_source/migration.sql
@@ -0,0 +1,14 @@
+ALTER TABLE "Person" ADD COLUMN IF NOT EXISTS "previousImportSource" TEXT;
+ALTER TABLE "Person" ADD COLUMN IF NOT EXISTS "previousSourceRef" TEXT;
+
+CREATE INDEX IF NOT EXISTS "Person_organizationId_previousSourceRef_idx" ON "Person"("organizationId", "previousSourceRef");
+
+-- اشخاصی که قبلاً از دیدار آمده‌اند و بعد با ته‌حساب بازنویسی شده‌اند: کد دیدار را به‌عنوان کد قبلی بازیابی کن
+UPDATE "Person"
+SET "previousImportSource" = 'didar',
+    "previousSourceRef" = TRIM("customFields"->>'didarId')
+WHERE "importSource" = 'tahesab'
+  AND "previousSourceRef" IS NULL
+  AND "customFields" IS NOT NULL
+  AND jsonb_typeof("customFields") = 'object'
+  AND COALESCE(TRIM("customFields"->>'didarId'), '') <> '';
diff --git a/apps/api/prisma/schema.prisma b/apps/api/prisma/schema.prisma
index 4f10a99..c731384 100644
--- a/apps/api/prisma/schema.prisma
+++ b/apps/api/prisma/schema.prisma
@@ -441,6 +441,9 @@ model Person {
   importSource   String       @default("manual")
   /// شناسه در مبدأ (کد دیدار، کد مشتری ته‌حساب، …)
   sourceRef      String?
+  /// منبع و کد قبلی وقتی شخص از منبع دیگری دوباره وارد شده (مثلاً دیدار قبل از ته‌حساب)
+  previousImportSource String?
+  previousSourceRef    String?
   email          String?
   phone          String?
   mobile         String?
@@ -488,6 +491,7 @@ model Person {
   @@index([organizationId, lastName, firstName])
   @@index([organizationId, importSource])
   @@index([organizationId, sourceRef])
+  @@index([organizationId, previousSourceRef])
   @@index([organizationId, loyaltyPoints])
   @@index([companyId])
   @@index([ownerId])
diff --git a/apps/api/src/contacts/people.service.ts b/apps/api/src/contacts/people.service.ts
index 375ce0c..36f8393 100644
--- a/apps/api/src/contacts/people.service.ts
+++ b/apps/api/src/contacts/people.service.ts
@@ -53,6 +53,8 @@ type PersonRow = {
   previousLastName: string | null;
   importSource: string;
   sourceRef: string | null;
+  previousImportSource: string | null;
+  previousSourceRef: string | null;
   email: string | null;
   phone: string | null;
   mobile: string | null;
@@ -119,6 +121,7 @@ export class PeopleService {
               { mobile: { contains: q.trim() } },
               { phone: { contains: q.trim() } },
               { sourceRef: { contains: q.trim() } },
+              { previousSourceRef: { contains: q.trim() } },
               { company: { name: { contains: q.trim(), mode: 'insensitive' } } },
             ],
           }
@@ -373,6 +376,8 @@ export class PeopleService {
       previousFullName: previousFullName || null,
       importSource,
       sourceRef: row.sourceRef,
+      previousImportSource: row.previousImportSource,
+      previousSourceRef: row.previousSourceRef,
       fullName: `${row.firstName} ${row.lastName}`.trim(),
       email: row.email,
       phone: row.phone,
diff --git a/apps/api/src/contacts/person-source.ts b/apps/api/src/contacts/person-source.ts
index 1aa0ebd..1caddae 100644
--- a/apps/api/src/contacts/person-source.ts
+++ b/apps/api/src/contacts/person-source.ts
@@ -29,6 +29,45 @@ export function personImportSourceLabel(source: string): string {
   return source || PERSON_IMPORT_SOURCE_LABELS.manual;
 }
 
+type SourceSnapshot = {
+  importSource?: string | null;
+  sourceRef?: string | null;
+  previousImportSource?: string | null;
+  previousSourceRef?: string | null;
+  customFields?: unknown;
+};
+
+function didarIdFrom(customFields: unknown): string | null {
+  if (!customFields || typeof customFields !== 'object') return null;
+  const raw = (customFields as Record<string, unknown>).didarId;
+  if (typeof raw === 'number' && Number.isFinite(raw)) return String(raw);
+  if (typeof raw === 'string' && raw.trim()) return raw.trim();
+  return null;
+}
+
+/**
+ * وقتی شخصِ موجود از منبع دیگری دوباره وارد می‌شود، منبع و کد فعلی را به‌عنوان «قبلی» نگه می‌دارد.
+ * اگر منبع یکسان باشد (ورود مجدد از همان منبع)، مقادیر قبلی دست نمی‌خورند.
+ */
+export function carryPreviousSource(
+  existing: SourceSnapshot,
+  nextSource: PersonImportSource,
+): { previousImportSource?: string | null; previousSourceRef?: string | null } {
+  const currentSource = normalizePersonImportSource(existing.importSource);
+  if (currentSource === nextSource) return {};
+  let ref = existing.sourceRef?.trim() || null;
+  let source: string = currentSource;
+  if (!ref) {
+    const didarId = didarIdFrom(existing.customFields);
+    if (didarId && nextSource !== 'didar') {
+      ref = didarId;
+      source = 'didar';
+    }
+  }
+  if (source === 'manual' && !ref) return {};
+  return { previousImportSource: source, previousSourceRef: ref };
+}
+
 export function namesDiffer(
   aFirst: string,
   aLast: string,
diff --git a/apps/api/src/integrations/tahesab/person-link.service.ts b/apps/api/src/integrations/tahesab/person-link.service.ts
index 0fc3bf8..38cc2dd 100644
--- a/apps/api/src/integrations/tahesab/person-link.service.ts
+++ b/apps/api/src/integrations/tahesab/person-link.service.ts
@@ -6,6 +6,7 @@ import {
 } from '@nestjs/common';
 import { Prisma } from '@prisma/client';
 import { PrismaService } from '../../prisma/prisma.service';
+import { carryPreviousSource } from '../../contacts/person-source';
 import { TahesabConnectionsService } from './connections.service';
 import {
   CreateInTahesabDto,
@@ -514,6 +515,7 @@ export class TahesabPersonLinkService {
                 previousLastName: prevLast || null,
               }
             : {}),
+          ...carryPreviousSource(existing, 'tahesab'),
           importSource: 'tahesab',
           sourceRef,
           ...(mobile
@@ -549,6 +551,7 @@ export class TahesabPersonLinkService {
                   previousLastName: byMobile.lastName || null,
                 }
               : {}),
+            ...carryPreviousSource(byMobile, 'tahesab'),
             importSource: 'tahesab',
             sourceRef,
           },
diff --git a/apps/web/src/views/ContactsView.vue b/apps/web/src/views/ContactsView.vue
index 4a9214f..195e13d 100644
--- a/apps/web/src/views/ContactsView.vue
+++ b/apps/web/src/views/ContactsView.vue
@@ -655,7 +655,13 @@ onMounted(load);
                   قبلی: {{ p.previousFullName }}
                 </div>
               </td>
-              <td>{{ sourceLabel(p.importSource || 'manual') }}</td>
+              <td>
+                {{ sourceLabel(p.importSource || 'manual') }}
+                <div v-if="p.previousImportSource" class="muted tiny">
+                  قبلاً: {{ sourceLabel(p.previousImportSource) }}
+                  <bdi v-if="p.previousSourceRef">{{ toFaDigits(p.previousSourceRef) }}</bdi>
+                </div>
+              </td>
               <td dir="ltr">{{ externalCodeLabel(p) }}</td>
               <td>{{ p.position || '—' }}</td>
               <td>
diff --git a/apps/web/src/views/PersonProfileView.vue b/apps/web/src/views/PersonProfileView.vue
index 8db4595..b3dcad2 100644
--- a/apps/web/src/views/PersonProfileView.vue
+++ b/apps/web/src/views/PersonProfileView.vue
@@ -148,18 +148,25 @@ const externalCode = computed(() => {
   }
   return '';
 });
+const SOURCE_LABELS: Record<string, string> = {
+  manual: 'دستی',
+  tahesab: 'ته‌حساب',
+  didar: 'دیدار',
+  excel: 'اکسل',
+  phone: 'مخاطبین گوشی',
+  lead_form: 'فرم لید',
+  other: 'سایر',
+};
+
 const importSourceLabel = computed(() => {
   const src = person.value?.importSource || 'manual';
-  const map: Record<string, string> = {
-    manual: 'دستی',
-    tahesab: 'ته‌حساب',
-    didar: 'دیدار',
-    excel: 'اکسل',
-    phone: 'مخاطبین گوشی',
-    lead_form: 'فرم لید',
-    other: 'سایر',
-  };
-  return map[src] || src;
+  return SOURCE_LABELS[src] || src;
+});
+
+const previousSourceLabel = computed(() => {
+  const src = person.value?.previousImportSource;
+  if (!src) return '';
+  return SOURCE_LABELS[src] || src;
 });
 
 const lastCallAt = computed(() => {
@@ -643,6 +650,12 @@ watch(() => route.query.tab, readTab, { immediate: true });
               <span v-if="person.previousFullName" class="meta-chip">
                 نام قبلی: {{ person.previousFullName }}
               </span>
+              <span v-if="previousSourceLabel" class="meta-chip prev">
+                قبلاً در {{ previousSourceLabel }}
+                <template v-if="person.previousSourceRef">
+                  — کد <bdi>{{ toFaDigits(person.previousSourceRef) }}</bdi>
+                </template>
+              </span>
             </div>
           </div>
           <div class="hero-side">
@@ -1185,6 +1198,11 @@ watch(() => route.query.tab, readTab, { immediate: true });
   color: #0f766e;
 }
 
+.meta-chip.prev {
+  background: #fef3c7;
+  color: #92400e;
+}
+
 .hero-side {
   display: grid;
   justify-items: end;
diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index afebaa4..8cc73b1 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -747,6 +747,9 @@ export interface PersonDto {
   previousFullName: string | null;
   importSource: PersonImportSource | string;
   sourceRef: string | null;
+  /** منبع/کد قبل از آخرین ورود از منبع دیگر (مثلاً کد دیدار پیش از ته‌حساب) */
+  previousImportSource: PersonImportSource | string | null;
+  previousSourceRef: string | null;
   fullName: string;
   email: string | null;
   phone: string | null;