diff --git a/apps/backend/src/repositories/worker-platform/after-sales-repo.ts b/apps/backend/src/repositories/worker-platform/after-sales-repo.ts
index 74aa0a72..c103cbdc 100644
--- a/apps/backend/src/repositories/worker-platform/after-sales-repo.ts
+++ b/apps/backend/src/repositories/worker-platform/after-sales-repo.ts
@@ -3,6 +3,7 @@ import type { PoolClient } from 'pg'
 import { query, withTransaction } from '../../db/client.js'
 import { resolveAfterSalesRecoveryAllocation } from './after-sales-recovery.js'
 import { ensureWorkerWalletWithClient, getWorkerWalletWithClient } from './shared.js'
+import { getConsignmentSupplierByWorkOrderWithClient } from './consignment-supplier-repo.js'
 import type {
   WorkerAfterSalesCaseEventRow,
   WorkerAfterSalesCaseRow,
@@ -89,6 +90,19 @@ export async function createAfterSalesCase(input: {
         shareQuantity: Number(share.quantity || 0),
       }
     }
+    if (workerId <= 0) {
+      // 内部现货履约的寄卖单没有接单打手，但货是供货卖家交付的、货款也结算给了他，
+      // 售后要担责的人就是他；不认寄卖关系的话这类单子连案都立不了。
+      const supplier = await getConsignmentSupplierByWorkOrderWithClient(client, input.workOrderId)
+      workerId = Number(supplier?.workerId || 0)
+      if (workerId > 0) {
+        acceptanceSnapshot = {
+          ...acceptanceSnapshot,
+          consignmentSupplier: true,
+          consignmentSubmissionNo: supplier?.submissionNo || '',
+        }
+      }
+    }
     if (workerId <= 0) {
       return { case: null, failureReason: 'worker_missing' }
     }
diff --git a/apps/backend/src/repositories/worker-platform/consignment-deposit-repo.ts b/apps/backend/src/repositories/worker-platform/consignment-deposit-repo.ts
index 9fc4cbc7..d218f19a 100644
--- a/apps/backend/src/repositories/worker-platform/consignment-deposit-repo.ts
+++ b/apps/backend/src/repositories/worker-platform/consignment-deposit-repo.ts
@@ -5,6 +5,7 @@ import { ensureWorkerWalletWithClient, getWorkerWalletWithClient, toJsonString }
 import { offsetWorkerAfterSalesDebtsWithClient } from './after-sales-repo.js'
 import { enqueueDepositUnfreezeWithClient } from './work-order-deposit-repo.js'
 import { maybeUpgradeWorkerLevelWithClient } from './worker-ranking-repo.js'
+import { getConsignmentSupplierByWorkOrderWithClient } from './consignment-supplier-repo.js'
 
 /**
  * 查询寄卖提报押金尚未释放的金额（分）
@@ -448,53 +449,11 @@ export async function settleConsignmentSupplierPayoutByWorkOrderWithClient(
     now: string
   },
 ): Promise<{ workerId: number; amountFen: number } | null> {
-  const res = await client.query<{
-    inventory_id: number
-    inventory_worker_id: number | null
-    cost_price_fen: number
-    submission_worker_id: number | null
-    asking_price_fen: number
-    submission_no: string | null
-  }>(
-    `
-      SELECT
-        inv.id AS inventory_id,
-        inv.worker_id AS inventory_worker_id,
-        inv.cost_price_fen,
-        cs.worker_id AS submission_worker_id,
-        cs.asking_price_fen,
-        cs.submission_no
-      FROM work_orders wo
-      JOIN consignment_inventories inv
-        ON inv.id = CASE
-          WHEN (wo.material_json->'consignment'->>'inventoryId') ~ '^[0-9]+$'
-            THEN (wo.material_json->'consignment'->>'inventoryId')::int
-        END
-      LEFT JOIN consignment_submissions cs ON cs.id = inv.source_submission_id
-      WHERE wo.id = $1
-      UNION ALL
-      SELECT
-        inv.id,
-        inv.worker_id,
-        inv.cost_price_fen,
-        cs.worker_id,
-        cs.asking_price_fen,
-        cs.submission_no
-      FROM consignment_inventories inv
-      LEFT JOIN consignment_submissions cs ON cs.id = inv.source_submission_id
-      WHERE inv.bound_work_order_id = $1
-      LIMIT 1
-    `,
-    [input.workOrderId],
-  )
-  const target = res.rows[0]
-  if (!target) return null
+  const supplier = await getConsignmentSupplierByWorkOrderWithClient(client, input.workOrderId)
+  if (!supplier) return null
 
-  const supplierId =
-    Number(target.inventory_worker_id || 0) || Number(target.submission_worker_id || 0)
-  const amountFen =
-    Math.round(Number(target.cost_price_fen || 0)) ||
-    Math.round(Number(target.asking_price_fen || 0))
+  const supplierId = supplier.workerId
+  const amountFen = supplier.costPriceFen || supplier.askingPriceFen
   if (supplierId <= 0 || amountFen <= 0) return null
   // 接单人就是供货卖家时，货款已经随工单报酬结算过，不重复付款
   if (Number(input.assignedWorkerId || 0) === supplierId) return null
@@ -556,8 +515,8 @@ export async function settleConsignmentSupplierPayoutByWorkOrderWithClient(
         : `寄卖货款结算 #${input.workOrderId}`,
       toJsonString({
         workOrderId: Number(input.workOrderId),
-        inventoryId: Number(target.inventory_id),
-        submissionNo: target.submission_no || '',
+        inventoryId: supplier.inventoryId,
+        submissionNo: supplier.submissionNo,
         costPriceFen: amountFen,
         ...(shouldDelayUnfreeze ? { unfreezeDays: input.unfreezeDays } : {}),
       }),
diff --git a/apps/backend/src/repositories/worker-platform/consignment-supplier-repo.ts b/apps/backend/src/repositories/worker-platform/consignment-supplier-repo.ts
new file mode 100644
index 00000000..93ad6b07
--- /dev/null
+++ b/apps/backend/src/repositories/worker-platform/consignment-supplier-repo.ts
@@ -0,0 +1,73 @@
+import type { PoolClient } from 'pg'
+
+/**
+ * 从工单反查寄卖的**供货卖家**（交付这件货、该收货款的人）。
+ *
+ * 为什么需要它：寄卖单在"内部现货履约"时是客服/内部仓代交付，工单上**没有接单打手**
+ * （`assigned_worker_id` 为空），于是所有"只认接单人"的逻辑都会落空——
+ * 货款没人收、售后找不到责任人都属于这一类。供货卖家只能从寄卖关系里查：
+ * 工单（`material_json.consignment.inventoryId` 或库存的 `bound_work_order_id`）
+ * → 库存 → 提报单。
+ */
+export type ConsignmentSupplier = {
+  workerId: number
+  inventoryId: number
+  costPriceFen: number
+  askingPriceFen: number
+  submissionNo: string
+}
+
+export async function getConsignmentSupplierByWorkOrderWithClient(
+  client: PoolClient,
+  workOrderId: number | string,
+): Promise<ConsignmentSupplier | null> {
+  const res = await client.query<{
+    inventory_id: number
+    inventory_worker_id: number | null
+    cost_price_fen: string | number | null
+    submission_worker_id: number | null
+    asking_price_fen: string | number | null
+    submission_no: string | null
+  }>(
+    `
+      SELECT
+        inv.id AS inventory_id,
+        inv.worker_id AS inventory_worker_id,
+        inv.cost_price_fen,
+        cs.worker_id AS submission_worker_id,
+        cs.asking_price_fen,
+        cs.submission_no
+      FROM work_orders wo
+      JOIN consignment_inventories inv
+        ON inv.id = CASE
+          WHEN (wo.material_json->'consignment'->>'inventoryId') ~ '^[0-9]+$'
+            THEN (wo.material_json->'consignment'->>'inventoryId')::int
+        END
+      LEFT JOIN consignment_submissions cs ON cs.id = inv.source_submission_id
+      WHERE wo.id = $1
+      UNION ALL
+      SELECT
+        inv.id,
+        inv.worker_id,
+        inv.cost_price_fen,
+        cs.worker_id,
+        cs.asking_price_fen,
+        cs.submission_no
+      FROM consignment_inventories inv
+      LEFT JOIN consignment_submissions cs ON cs.id = inv.source_submission_id
+      WHERE inv.bound_work_order_id = $1
+      LIMIT 1
+    `,
+    [workOrderId],
+  )
+  const row = res.rows[0]
+  if (!row) return null
+
+  return {
+    workerId: Number(row.inventory_worker_id || 0) || Number(row.submission_worker_id || 0),
+    inventoryId: Number(row.inventory_id),
+    costPriceFen: Math.round(Number(row.cost_price_fen || 0)),
+    askingPriceFen: Math.round(Number(row.asking_price_fen || 0)),
+    submissionNo: String(row.submission_no || ''),
+  }
+}
diff --git a/apps/backend/src/services/worker-platform/consignment-payout.test.ts b/apps/backend/src/services/worker-platform/consignment-payout.test.ts
index 52a6232a..07158cf9 100644
--- a/apps/backend/src/services/worker-platform/consignment-payout.test.ts
+++ b/apps/backend/src/services/worker-platform/consignment-payout.test.ts
@@ -43,3 +43,31 @@ test('寄卖货款：接单人就是供货卖家时不重复付款，金额取
   assert.ok(source.includes('offsetWorkerAfterSalesDebtsWithClient('))
   assert.ok(source.includes('enqueueDepositUnfreezeWithClient('))
 })
+
+test('售后立案：内部现货履约（无接单打手）时要落到供货卖家，否则连案都立不了', async () => {
+  const afterSalesSource = await readFile(
+    new URL('../../repositories/worker-platform/after-sales-repo.ts', import.meta.url),
+    'utf8',
+  )
+  assert.ok(afterSalesSource.includes('getConsignmentSupplierByWorkOrderWithClient('))
+  assert.ok(afterSalesSource.includes('worker_missing'))
+  assert.ok(
+    afterSalesSource.indexOf('getConsignmentSupplierByWorkOrderWithClient(') <
+      afterSalesSource.lastIndexOf("'worker_missing'"),
+    '必须先尝试认寄卖关系，再判定找不到责任人',
+  )
+})
+
+test('"从工单找供货卖家"只有一处实现，货款与售后共用', async () => {
+  const supplierRepo = await readFile(
+    new URL('../../repositories/worker-platform/consignment-supplier-repo.ts', import.meta.url),
+    'utf8',
+  )
+  assert.ok(
+    supplierRepo.includes('export async function getConsignmentSupplierByWorkOrderWithClient'),
+  )
+  const depositSource = await readFile(DEPOSIT_REPO, 'utf8')
+  assert.ok(depositSource.includes('getConsignmentSupplierByWorkOrderWithClient('))
+  // 取卖家那段 SQL（含 UNION ALL 兜底）只应存在于共享查询里，别处不要再抄一份
+  assert.equal(depositSource.includes('UNION ALL'), false)
+})
diff --git a/docs/寄卖系统优化方案.md b/docs/寄卖系统优化方案.md
index e2375ab1..636e21c7 100644
--- a/docs/寄卖系统优化方案.md
+++ b/docs/寄卖系统优化方案.md
@@ -21,6 +21,7 @@
 | `632dddc4` | 上一轮：H5 渠道整体下线 + 凭据字段修复 + 状态机封闭（撤销守卫 / 库存绑定唯一性 / 生命周期解绑）+ 押金归属取台账 | 迁移 `079`、`consignment-*` 五个文件、`work-order-*` 三个仓库、两个前端面板 |
 | `5d11bf20` | 批次 C+D：指派部分成功补偿、凭证核销如实反馈、空规格不放行 + 履约/指派服务端规格复检 | `consignment-fulfillment-service.ts`、`consignment-matching-service.ts`、`consignment-repo.ts`、履约路由、`WorkOrdersPanel.tsx` |
 | `d6f6219f` | 批次 F1：内部现货履约停在「待加好友」，客服确认后才进赠送冷却 + 备注快捷项 | `work-order-gift-repo.ts`、履约服务、`WorkOrdersPanel.tsx`、`utils/gift-phase.ts` |
+| 本批提交（批次 R，同一提交内含本文档，故不写自身 hash） | 批次 R：售后立案回落到供货卖家；抽共享"从工单找供货卖家"查询 | `consignment-supplier-repo.ts`、`after-sales-repo.ts`、`consignment-deposit-repo.ts` |
 | 本批提交（批次 Q，同一提交内含本文档，故不写自身 hash） | 批次 Q：验收结算补寄卖货款给供货卖家；修指派打手线报酬 100 倍单位错 | `consignment-deposit-repo.ts`、`work-order-settlement-repo.ts`、`consignment-fulfillment-service.ts` |
 | 本批提交（批次 P，同一提交内含本文档，故不写自身 hash） | 批次 P：确认加好友/上传赠送截图恢复为卖家操作，客服兜底 | `consignment-item-stage.ts`、`consignment-worker-service.ts`、`worker-acceptance-service.ts` |
 | 本批提交（批次 O，同一提交内含本文档，故不写自身 hash） | 批次 O：文件链接去掉签名与有效期（修客服端凭证裂图），寄卖出参统一归一化 | `file-storage-service.ts`、`routes/files.ts`、`consignment-admin-service.ts` |
@@ -287,6 +288,30 @@
    前端在"部分匹配"候选上先 `modal.confirm` 危险确认，再带 `allowPartial: true` 重试，高配充低配的合法玩法保留但不可误触。
 3. ⏳ 匹配下推 SQL + 批量匹配接口 + 工单列表角标（P2-8）未做：当前仍是"取全量在库 → 内存比对"。
 
+### 批次 R · 售后立案也认寄卖关系（本轮）
+
+补货款时顺手排查"只认接单人"的地方，发现同类第三处：**售后立案**。
+
+`createAfterSalesCase` 里责任人取 `work_orders.assigned_worker_id`，取不到就
+`failureReason: 'worker_missing'` → 客服界面上是 409「请指定已验收的责任打手或拼单份额」。
+内部现货履约的寄卖单**没有接单人**，于是这类单子**连售后都立不了案**；
+而货款修好后，钱已经结算给供货卖家了，担责的人本来就该是他。
+
+**改法**：把"从工单反查供货卖家"抽成共享查询
+`getConsignmentSupplierByWorkOrderWithClient()`（`consignment-supplier-repo.ts`），
+货款结算与售后立案共用同一份口径（工单 `material_json.consignment.inventoryId`
+或库存 `bound_work_order_id` → 库存 → 提报单），售后在找不到接单人时回落到供货卖家，
+并在验收快照里标记 `consignmentSupplier: true` 与提报单号留痕。
+
+**真实库验证**（内部现货履约，接单人为空）：
+
+| 步骤 | 结果 |
+| --- | --- |
+| 从工单反查供货卖家 | `workerId=3`、结算价 12400、提报单号正确 ✅（不是无关的打手 4） |
+| 售后立案 | ✅ 成功，`case_no=VERIFY-AS-…`，责任人 `worker_id=3`（供货卖家） |
+
+临时数据已清理（残留 0）。至此"寄卖单没有接单人"这一类坑的三处（货款、售后、卖家按钮）都已收口。
+
 ### 批次 Q · 补上寄卖**货款**结算（本轮）
 
 **问题（用户对账发现）**：工单 #100171 验收完成时，卖家钱包只有两笔——发布押金 -20 又 +20。