---
title: "Link customer bank account to a transaction (authenticated via resolution token)"
method: PUT
path: "/api/v1/transactions/{transactionId}/customer-bank-account"
tags: ["Transaction Updates (Token)"]
---

# Link customer bank account to a transaction (authenticated via resolution token)

`PUT /api/v1/transactions/{transactionId}/customer-bank-account`

## Request

- Base URL: `https://core.quidkey.com`
- URL: `https://core.quidkey.com/api/v1/transactions/{transactionId}/customer-bank-account`
- Auth: none declared
- TypeScript: <https://skmtc.dev/banqzinc/apis/quidkey-api/docs/api/v1/transactions/:transactionId/customer-bank-account/put.ts> (a function with typed inputs; its response is checked against the schema)

Link customer bank account to a transaction (authenticated via resolution token)

## Path parameters

- `transactionId` string, uuid, required: The unique identifier of the transaction

## Request body

- CustomerBankAccountInput: Customer bank account creation/update input
  - `account_holder_name` string, required: Name of the account holder
  - `customer_id` string, uuid: The customer who owns this bank account. Required when minting accounts outside the Flinks-linking flow.
  - `account_type` union: US ACH account type
    - 'checking'
    - 'savings'
  - `currency` string, required: The currency of the bank account
  - `country` string, required: The country of the bank account
  - `iban` string: The IBAN of the bank account
  - `account_number` string: The account number of the bank account
  - `sort_code` string: The sort code of the bank account (UK)
  - `routing_number` string: The routing number of the bank account (US)
  - `bban` string: Basic Bank Account Number (e.g., Norway)
  - `plusgiro_number` string: PlusGiro number (Sweden)
  - `bsb` string: Bank State Branch code (Australia)
  - `bic` string: The BIC/SWIFT code of the bank account

## Response `200`

Success

- ResolutionLinkTokenUpdateSuccess
  - `success` boolean, required: Indicates if the request was successful
  - `data` object, required
    - `success` boolean, required

## Other responses

- `400`: Bad Request
- `403`: Forbidden

## Changes

- **2026-06-17** `b372e7d5563d`: 1 info
  - endpoint added
- **2025-11-02** `919eb7a392aa`: 1 breaking
  - api path removed without deprecation

[Operation history](https://skmtc.dev/banqzinc/apis/quidkey-api/changes/api/v1/transactions/:transactionId/customer-bank-account/put.md)

---

[API](https://skmtc.dev/banqzinc/apis/quidkey-api.md) - [All operations](https://skmtc.dev/banqzinc/apis/quidkey-api/llms.txt) - [OpenAPI document](https://skmtc.dev/banqzinc/apis/quidkey-api/revisions/f86d2bdbcb08?raw)