diff --git a/packages/transaction-pay-controller/CHANGELOG.md b/packages/transaction-pay-controller/CHANGELOG.md
index 2589b78feaf..fff8b923e39 100644
--- a/packages/transaction-pay-controller/CHANGELOG.md
+++ b/packages/transaction-pay-controller/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Fix Across deposit status polling to query `/deposit/status` with `depositTxnRef=<source transaction hash>` and return `fillTxnRef` when Across omits the destination hash ([#8489](https://github.com/MetaMask/core/pull/8489))
+
 ## [19.2.0]
 
 ### Changed
diff --git a/packages/transaction-pay-controller/src/strategy/across/across-submit.test.ts b/packages/transaction-pay-controller/src/strategy/across/across-submit.test.ts
index 962302cf373..8bd82fab907 100644
--- a/packages/transaction-pay-controller/src/strategy/across/across-submit.test.ts
+++ b/packages/transaction-pay-controller/src/strategy/across/across-submit.test.ts
@@ -139,7 +139,7 @@ describe('Across Submit', () => {
       transactionMeta: TRANSACTION_META_MOCK,
     });
     successfulFetchMock.mockResolvedValue({
-      json: async () => ({ status: 'pending' }),
+      json: async () => ({ status: 'success' }),
     } as Response);
   });
 
@@ -576,7 +576,7 @@ describe('Across Submit', () => {
       );
     });
 
-    it('polls Across status endpoint when quote includes a deposit id', async () => {
+    it('polls Across status endpoint with depositTxnRef from the source tx hash', async () => {
       const confirmedTransaction = {
         id: 'new-tx',
         chainId: '0x1',
@@ -633,7 +633,7 @@ describe('Across Submit', () => {
       });
 
       expect(successfulFetchMock).toHaveBeenCalledWith(
-        expect.stringContaining('/deposit/status?'),
+        expect.stringContaining('/deposit/status?depositTxnRef=0xconfirmed'),
         expect.objectContaining({ method: 'GET' }),
       );
       expect(result.transactionHash).toBe('0xtarget');
@@ -728,6 +728,25 @@ describe('Across Submit', () => {
       }
     });
 
+    it('returns fill txn ref when destination hash is missing', async () => {
+      setupConfirmedSubmission();
+      successfulFetchMock.mockResolvedValueOnce({
+        json: async () => ({
+          fillTxnRef: '0xfillref',
+          status: 'filled',
+        }),
+      } as Response);
+
+      const result = await submitAcrossQuotes({
+        messenger,
+        quotes: [buildDepositQuote()],
+        transaction: TRANSACTION_META_MOCK,
+        isSmartTransaction: jest.fn(),
+      });
+
+      expect(result.transactionHash).toBe('0xfillref');
+    });
+
     it('returns fill tx hash when destination hash is missing', async () => {
       setupConfirmedSubmission();
       successfulFetchMock.mockResolvedValueOnce({
diff --git a/packages/transaction-pay-controller/src/strategy/across/across-submit.ts b/packages/transaction-pay-controller/src/strategy/across/across-submit.ts
index 4a50e9b832b..d199bd2566c 100644
--- a/packages/transaction-pay-controller/src/strategy/across/across-submit.ts
+++ b/packages/transaction-pay-controller/src/strategy/across/across-submit.ts
@@ -242,34 +242,28 @@ async function submitTransactions(
     ? getTransaction(transactionIds.slice(-1)[0], messenger)?.hash
     : undefined;
 
-  return await waitForAcrossCompletion(
-    quote.original,
-    hash as Hex | undefined,
-    messenger,
-  );
+  return await waitForAcrossCompletion(hash as Hex | undefined, messenger);
 }
 
 type AcrossStatusResponse = {
   status?: string;
   destinationTxHash?: Hex;
+  fillTxnRef?: Hex;
   fillTxHash?: Hex;
   txHash?: Hex;
 };
 
 async function waitForAcrossCompletion(
-  quote: AcrossQuote,
   transactionHash: Hex | undefined,
   messenger: TransactionPayControllerMessenger,
 ): Promise<Hex | undefined> {
-  if (!transactionHash || !quote.quote.id) {
+  if (!transactionHash) {
     return transactionHash;
   }
 
   const config = getPayStrategiesConfig(messenger);
   const params = new URLSearchParams({
-    depositId: quote.quote.id,
-    originChainId: String(quote.quote.swapTx.chainId),
-    txHash: transactionHash,
+    depositTxnRef: transactionHash,
   });
   const url = `${config.across.apiBase}/deposit/status?${params.toString()}`;
 
@@ -313,6 +307,7 @@ async function waitForAcrossCompletion(
       ['completed', 'filled', 'success'].includes(normalizedStatus)
     ) {
       return (
+        status.fillTxnRef ??
         status.destinationTxHash ??
         status.fillTxHash ??
         status.txHash ??