diff --git a/src/libs/API/parameters/AddPersonalBankAccountParams.ts b/src/libs/API/parameters/AddPersonalBankAccountParams.ts
index 496c9a6b02c6..20b5b92c014f 100644
--- a/src/libs/API/parameters/AddPersonalBankAccountParams.ts
+++ b/src/libs/API/parameters/AddPersonalBankAccountParams.ts
@@ -13,6 +13,7 @@ type AddPersonalBankAccountParams = {
     legalFirstName?: string;
     legalLastName?: string;
     addressStreet?: string;
+    addressStreet2?: string;
     addressCity?: string;
     addressState?: string;
     addressZip?: string;
diff --git a/src/libs/actions/BankAccounts.ts b/src/libs/actions/BankAccounts.ts
index b5e617f090f8..af8ea02d9a52 100644
--- a/src/libs/actions/BankAccounts.ts
+++ b/src/libs/actions/BankAccounts.ts
@@ -561,7 +561,8 @@ function addPersonalBankAccount(
         phoneNumber: account?.phoneNumber,
         legalFirstName: account?.legalFirstName,
         legalLastName: account?.legalLastName,
-        addressStreet: getFormattedStreet(account?.addressStreet, account?.addressStreet2),
+        addressStreet: account?.addressStreet,
+        addressStreet2: account?.addressStreet2 ?? '',
         addressCity: account?.addressCity,
         addressState: account?.addressState,
         addressZip: account?.addressZipCode,
diff --git a/tests/unit/BankAccountsTest.ts b/tests/unit/BankAccountsTest.ts
index e588c964c9f2..909c95750e0a 100644
--- a/tests/unit/BankAccountsTest.ts
+++ b/tests/unit/BankAccountsTest.ts
@@ -100,6 +100,32 @@ describe('BankAccounts', () => {
             const personalBankAccount = await getOnyxValue(ONYXKEYS.PERSONAL_BANK_ACCOUNT);
             expect(getLatestErrorMessage(personalBankAccount)).toBe(serverMessage);
         });
+
+        test('sends both address lines as separate params', () => {
+            // Given an account with a second address line, which the API rejects when joined into addressStreet with a newline
+            const account = {addressStreet: '123 Main St', addressStreet2: 'Apt 4B'};
+
+            // When adding the personal bank account
+            addPersonalBankAccount(account, undefined);
+
+            // Then each line is sent in its own param so the backend can store both
+            expect(mockWrite).toHaveBeenCalledWith(
+                WRITE_COMMANDS.ADD_PERSONAL_BANK_ACCOUNT,
+                expect.objectContaining({addressStreet: '123 Main St', addressStreet2: 'Apt 4B'}),
+                expect.anything(),
+            );
+        });
+
+        test('sends an empty second address line when addressStreet2 is missing', () => {
+            // Given an account without a second address line
+            const account = {addressStreet: '123 Main St'};
+
+            // When adding the personal bank account
+            addPersonalBankAccount(account, undefined);
+
+            // Then the second line is sent as an empty string, matching updatePersonalBankAccountInfo
+            expect(mockWrite).toHaveBeenCalledWith(WRITE_COMMANDS.ADD_PERSONAL_BANK_ACCOUNT, expect.objectContaining({addressStreet: '123 Main St', addressStreet2: ''}), expect.anything());
+        });
     });
 
     describe('deletePaymentBankAccount', () => {