diff --git a/file/AGENTS.md b/file/AGENTS.md
index a9deab837..735db9c90 100644
--- a/file/AGENTS.md
+++ b/file/AGENTS.md
@@ -15,7 +15,7 @@
 | 测量图片/证据 | `controller/PlatformMeasurementImageController.java`、`InternalMeasurementImageController.java`、`service/MeasurementImageService.java` |
 | 平台订单商品图片读取 | `controller/PlatformProductImageController.java` 的 `/api/platform/v1/files/product-images/{tenantId}/{fileId}`、`service/ProductImageService.java`；仅平台 `platform:order:list` 可按明确客户与文件 ID 内联读取，响应 `no-store` |
 | 装柜与业务文件证据 | `controller/PlatformLoadingEvidenceController.java`、`InternalLoadingEvidenceController.java`、`service/LoadingEvidenceService.java`、`src/main/resources/openapi/loading-evidence-v1.yaml`；五类装柜证据固定为平台所有、`tenantId=0`、`businessId=containerBookingId`，不得绑定客户或入仓单。其他业务文件进入 `InternalBusinessFileController.java`、`service/InternalBusinessFileService.java` |
-| 财务付款凭证、海外卸柜照片 | 通用业务文件入口 `InternalBusinessFileController.java`、`InternalBusinessFileService.java`；业务类型分别为 `FINANCE_VOUCHER`、`OVERSEAS_UNLOAD_PHOTO`，必须按客户与业务 ID 精确校验 |
+| 财务付款凭证、海外卸柜照片 | 通用业务文件入口 `InternalBusinessFileController.java`、`InternalBusinessFileService.java`；`FINANCE_VOUCHER` 按客户与业务 ID 精确校验；`OVERSEAS_UNLOAD_PHOTO` 是允许同柜多客户的柜级物理证据，固定平台所有（`tenantId=0`）并按接柜会话 ID 精确校验 |
 | 海外异常订单证据 | 通用内部业务文件入口；固定 `businessType=OVERSEAS_EXCEPTION_EVIDENCE`、`tenantId=异常订单所属客户ID`、`businessId=异常订单ID`，File 只校验文件复合归属，异常状态、完成门禁和证据引用归 Lastleg |
 | 入库扣货凭证 | 通用内部业务文件入口；固定 `businessType=INBOUND_HOLD_EVIDENCE`、`tenantId=客户ID`、`businessId=入库单ID`，客户作用域单文件最多 10MiB；可见性与历史引用由 Firstleg 校验 |
 | 报关源文件、完成文件与买单明细导出 | `src/main/resources/openapi/customs-file-and-export-v1.yaml`；文件类别 `LOADING_LIST_CUSTOMS_SOURCE`、`LOADING_LIST_CUSTOMS_RESULT` 均为客户作用域且最多 50MB，异步导出类型 `LOADING_LIST_BUY_DECLARATION_ITEMS` 由 Firstleg Provider 按固定十三列供数 |
diff --git a/file/src/main/java/com/baiyue/file/service/BusinessFileCategory.java b/file/src/main/java/com/baiyue/file/service/BusinessFileCategory.java
index 73613938b..87832a3ea 100644
--- a/file/src/main/java/com/baiyue/file/service/BusinessFileCategory.java
+++ b/file/src/main/java/com/baiyue/file/service/BusinessFileCategory.java
@@ -22,7 +22,7 @@ enum BusinessFileCategory {
     LOADING_CUSTOMS_DECLARATION(false, FormatPolicy.STANDARD, Limits.STANDARD, BusinessIdPolicy.POSITIVE_LONG),
     CONTAINER_DELIVERY_ORDER(false, FormatPolicy.STANDARD, Limits.STANDARD, BusinessIdPolicy.POSITIVE_LONG),
     CONTAINER_PICKUP_ORDER(false, FormatPolicy.STANDARD, Limits.STANDARD, BusinessIdPolicy.POSITIVE_LONG),
-    OVERSEAS_UNLOAD_PHOTO(true, FormatPolicy.STANDARD, Limits.STANDARD, BusinessIdPolicy.POSITIVE_LONG),
+    OVERSEAS_UNLOAD_PHOTO(false, FormatPolicy.STANDARD, Limits.STANDARD, BusinessIdPolicy.POSITIVE_LONG),
     OVERSEAS_RELABEL_PHOTO(true, FormatPolicy.STANDARD, Limits.STANDARD, BusinessIdPolicy.POSITIVE_LONG),
     OVERSEAS_EXCEPTION_EVIDENCE(true, FormatPolicy.STANDARD, Limits.STANDARD, BusinessIdPolicy.POSITIVE_LONG),
     LOADING_LIST_CUSTOMS_SOURCE(true, FormatPolicy.ARBITRARY, Limits.CUSTOMS, BusinessIdPolicy.POSITIVE_LONG),
@@ -53,8 +53,9 @@ enum BusinessFileCategory {
     }
 
     void validateOwner(long tenantId) {
-        if (this == OCEAN_BOOKING_DOCUMENT && tenantId != 0) {
-            throw new BizException(ResultCode.BAD_REQUEST, "订舱附件必须归属平台");
+        if ((this == OCEAN_BOOKING_DOCUMENT || this == OVERSEAS_UNLOAD_PHOTO) && tenantId != 0) {
+            throw new BizException(ResultCode.BAD_REQUEST,
+                this == OCEAN_BOOKING_DOCUMENT ? "订舱附件必须归属平台" : "海外卸柜照片必须归属平台");
         }
         if (customerOwned && tenantId <= 0) {
             throw new BizException(ResultCode.BAD_REQUEST, "该附件类型必须归属明确客户");
diff --git a/file/src/test/java/com/baiyue/file/service/InternalBusinessFileServiceTest.java b/file/src/test/java/com/baiyue/file/service/InternalBusinessFileServiceTest.java
index 9da25ae57..3f1c1fe34 100644
--- a/file/src/test/java/com/baiyue/file/service/InternalBusinessFileServiceTest.java
+++ b/file/src/test/java/com/baiyue/file/service/InternalBusinessFileServiceTest.java
@@ -44,8 +44,8 @@ class InternalBusinessFileServiceTest {
         when(storage.store(eq(0L), anyString(), same(file), any(BusinessFileCategory.class))).thenAnswer(invocation ->
             new BusinessFileStorage.Stored("business-files/0/" + invocation.getArgument(1) + "/customs.pdf",
                 "application/pdf", file.getSize(), "b".repeat(64), "customs.pdf"));
-        when(storage.store(11L, "51", file, BusinessFileCategory.OVERSEAS_UNLOAD_PHOTO)).thenReturn(new BusinessFileStorage.Stored(
-            "business-files/11/51/unload.jpg", "image/jpeg", file.getSize(), "c".repeat(64), "unload.jpg"));
+        when(storage.store(0L, "51", file, BusinessFileCategory.OVERSEAS_UNLOAD_PHOTO)).thenReturn(new BusinessFileStorage.Stored(
+            "business-files/0/51/unload.jpg", "image/jpeg", file.getSize(), "c".repeat(64), "unload.jpg"));
         when(files.insert(any(FileObjectEntity.class))).thenAnswer(invocation -> {
             ((FileObjectEntity) invocation.getArgument(0)).setId(81L); return 1;
         });
@@ -54,7 +54,7 @@ class InternalBusinessFileServiceTest {
         var customs = service.upload(0L, "LOADING_CUSTOMS_DECLARATION", "51", 7L, file);
         var deliveryOrder = service.upload(0L, "CONTAINER_DELIVERY_ORDER", "41", 7L, file);
         var pickupOrder = service.upload(0L, "CONTAINER_PICKUP_ORDER", "41", 7L, file);
-        var unloadPhoto = service.upload(11L, "OVERSEAS_UNLOAD_PHOTO", "51", 7L, file);
+        var unloadPhoto = service.upload(0L, "OVERSEAS_UNLOAD_PHOTO", "51", 7L, file);
 
         assertThat(clearance).extracting(InternalBusinessFileService.Metadata::tenantId,
             InternalBusinessFileService.Metadata::businessType,
@@ -67,12 +67,14 @@ class InternalBusinessFileServiceTest {
         assertThat(unloadPhoto).extracting(InternalBusinessFileService.Metadata::tenantId,
             InternalBusinessFileService.Metadata::businessType,
             InternalBusinessFileService.Metadata::businessId)
-            .containsExactly(11L, "OVERSEAS_UNLOAD_PHOTO", "51");
+            .containsExactly(0L, "OVERSEAS_UNLOAD_PHOTO", "51");
         verify(storage).store(0L, "41", file, BusinessFileCategory.CONTAINER_CLEARANCE_DOCUMENT);
         verify(storage).store(0L, "51", file, BusinessFileCategory.LOADING_CUSTOMS_DECLARATION);
         verify(storage).store(0L, "41", file, BusinessFileCategory.CONTAINER_DELIVERY_ORDER);
         verify(storage).store(0L, "41", file, BusinessFileCategory.CONTAINER_PICKUP_ORDER);
-        verify(storage).store(11L, "51", file, BusinessFileCategory.OVERSEAS_UNLOAD_PHOTO);
+        verify(storage).store(0L, "51", file, BusinessFileCategory.OVERSEAS_UNLOAD_PHOTO);
+        assertThatThrownBy(() -> service.upload(11L, "OVERSEAS_UNLOAD_PHOTO", "51", 7L, file))
+            .isInstanceOf(BizException.class).hasMessageContaining("卸柜照片必须归属平台");
     }
 
     @Test void oceanBookingDocumentUsesPlatformAndBookingOwnership() {
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/inboundplan/pda/gateway/HttpUnloadPhotoFileGatewayTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/inboundplan/pda/gateway/HttpUnloadPhotoFileGatewayTest.java
index 443d5fbee..674dd2745 100644
--- a/lastleg-service/src/test/java/com/baiyue/lastleg/inboundplan/pda/gateway/HttpUnloadPhotoFileGatewayTest.java
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/inboundplan/pda/gateway/HttpUnloadPhotoFileGatewayTest.java
@@ -33,11 +33,11 @@ class HttpUnloadPhotoFileGatewayTest {
 
     @Test
     void forgedImageBusinessFailureMapsToBadRequestInsteadOfInternalError() {
-        server.expect(requestTo("http://file-service/internal/file/v1/business-files/100/OVERSEAS_UNLOAD_PHOTO/8"))
+        server.expect(requestTo("http://file-service/internal/file/v1/business-files/0/OVERSEAS_UNLOAD_PHOTO/8"))
             .andRespond(withSuccess("{\"code\":\"A0400\",\"message\":\"上传内容不是有效图片\",\"data\":null}",
                 MediaType.APPLICATION_JSON));
 
-        assertThatThrownBy(() -> gateway.upload("100", 8L, 7L,
+        assertThatThrownBy(() -> gateway.upload("0", 8L, 7L,
             new MockMultipartFile("file", "forged.png", "image/png", "<script>".getBytes())))
             .isInstanceOfSatisfying(ResponseStatusException.class,
                 error -> assertThat(error.getStatusCode().value()).isEqualTo(400));
@@ -46,11 +46,11 @@ class HttpUnloadPhotoFileGatewayTest {
 
     @Test
     void mismatchedPhotoMetadataMapsToBadRequest() {
-        server.expect(requestTo("http://file-service/internal/file/v1/business-files/100/OVERSEAS_UNLOAD_PHOTO/8/9"))
-            .andRespond(withSuccess("{\"code\":\"200\",\"data\":{\"fileId\":9,\"tenantId\":101,\"businessType\":\"OVERSEAS_UNLOAD_PHOTO\",\"businessId\":\"8\"}}",
+        server.expect(requestTo("http://file-service/internal/file/v1/business-files/0/OVERSEAS_UNLOAD_PHOTO/8/9"))
+            .andRespond(withSuccess("{\"code\":\"200\",\"data\":{\"fileId\":9,\"tenantId\":1,\"businessType\":\"OVERSEAS_UNLOAD_PHOTO\",\"businessId\":\"8\"}}",
                 MediaType.APPLICATION_JSON));
 
-        assertThatThrownBy(() -> gateway.validate("100", 8L, 9L))
+        assertThatThrownBy(() -> gateway.validate("0", 8L, 9L))
             .isInstanceOfSatisfying(ResponseStatusException.class,
                 error -> assertThat(error.getStatusCode().value()).isEqualTo(400));
         server.verify();
@@ -59,12 +59,12 @@ class HttpUnloadPhotoFileGatewayTest {
     @Test
     void downloadUsesBusinessOwnershipPathAndPreservesBlobMetadata() {
         server.expect(requestTo(
-                "http://file-service/internal/file/v1/business-files/100/OVERSEAS_UNLOAD_PHOTO/8/9/content"))
+                "http://file-service/internal/file/v1/business-files/0/OVERSEAS_UNLOAD_PHOTO/8/9/content"))
             .andExpect(header("X-Internal-Service-Token", "internal-token"))
             .andRespond(withSuccess("photo-bytes".getBytes(), MediaType.IMAGE_JPEG)
                 .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=door.jpg"));
 
-        UnloadPhotoFileGateway.DownloadedFile result = gateway.download("100", 8L, 9L);
+        UnloadPhotoFileGateway.DownloadedFile result = gateway.download("0", 8L, 9L);
 
         assertThat(result.content()).containsExactly("photo-bytes".getBytes());
         assertThat(result.fileName()).isEqualTo("door.jpg");
@@ -75,10 +75,10 @@ class HttpUnloadPhotoFileGatewayTest {
     @Test
     void missingOwnedPhotoMapsToNotFound() {
         server.expect(requestTo(
-                "http://file-service/internal/file/v1/business-files/100/OVERSEAS_UNLOAD_PHOTO/8/9/content"))
+                "http://file-service/internal/file/v1/business-files/0/OVERSEAS_UNLOAD_PHOTO/8/9/content"))
             .andRespond(withStatus(HttpStatus.NOT_FOUND));
 
-        assertThatThrownBy(() -> gateway.download("100", 8L, 9L))
+        assertThatThrownBy(() -> gateway.download("0", 8L, 9L))
             .isInstanceOfSatisfying(ResponseStatusException.class,
                 error -> assertThat(error.getStatusCode().value()).isEqualTo(404));
         server.verify();