Step 2: Adding a Funding Source

After creating our receive-only User, the next step is to attach a bank funding source. This will be the funding source where they will receive funds.

Bank Addition and Verification methods

Within Dwolla, the sending party must always verify their bank account in order to be eligible to create a transfer. Although it’s recommended, the party that is receiving the funds does not need to undergo bank verification.

There are three ways of adding a bank to a Customer with the Dwolla API. A simplified table below outlines the similarities and differences of each method.

Bank Addition MethodWill the bank be verified?Required Information
API - Account/Routing NumberOptional - With MicrodepositsBank Account and Routing Number
Dwolla.js - Instant Account Verification (IAV)yesOnline bank credentials
Third Party - PlaidyesOnline bank credentials

For an in-depth look at these methods and the features and benefits of each, take a look at our developer resource article.

Step 2A: Adding a Bank to the Receive-only User

In this step, we will be adding a bank account to our receive-only user by collecting their bank details within a form on our application. After initial validation of the form fields, the user’s bank details will be submitted to our back-end server where the API request is made to Dwolla to add a bank account.

  1. For more information on securely submitting a user’s bank details directly to Dwolla from the client-side of your application, reference our helper library dwolla.js.

Request Parameters - Create a Funding Source

routingNumberyesstringThe bank routing number
accountNumberyesstringThe bank account number
bankAccountTypeyesstringType of bank account: checking or savings
nameyesstringArbitrary nickname for the funding source. Must be 50 characters or less
Content-Type: application/vnd.dwolla.v1.hal+json
Accept: application/vnd.dwolla.v1.hal+json
Authorization: Bearer 0Sn0W6kzNicvoWhDbQcVSKLRUpGjIdlPSEYyrHqrDDoRnQwE7Q
    "routingNumber": "222222226",
    "accountNumber": "123456789",
    "bankAccountType": "checking",
    "name": "Jane Merchant - Checking 6789"

HTTP/1.1 201 Created

customer_url = ''
request_body = {
  routingNumber: '222222226',
  accountNumber: '123456789',
  bankAccountType: 'checking',
  name: 'Jane Merchant - Checking 6789'

# Using DwollaV2 - (Recommended)
funding_source = "#{customer_url}/funding-sources", request_body
funding_source.response_headers[:location] # => ""
var customerUrl = '';
var requestBody = {
  'routingNumber': '222222226',
  'accountNumber': '123456789',
  'bankAccountType': 'checking',
  'name': 'Jane Merchant - Checking 6789'

  .post(`${customerUrl}/funding-sources`, requestBody)
  .then(function(res) {
    res.headers.get('location'); // => ''
customer_url = ''
request_body = {
  'routingNumber': '222222226',
  'accountNumber': '123456789',
  'bankAccountType': 'checking',
  'name': 'Jane Merchant - Checking 6789'

# Using dwollav2 - (Recommended)
customer ='%s/funding-sources' % customer_url, request_body)
customer.headers['location'] # => ''
$fundingApi = new DwollaSwagger\FundingsourcesApi($apiClient);

$new_fs = $fundingApi->createCustomerFundingSource([
  "routingNumber" => "222222226",
  "accountNumber" => "123456789",
  "bankAccountType" => "checking",
  "name" => "Jane Merchant - Checking 6789"
  ], ""

print($new_fs); # =>

When the funding source is created, you will receive a 201 HTTP response with an empty response body. You can refer to the Location header to retrieve a link to the created funding source resource. We recommend storing the full URL for future use as it will be referenced when creating the transfer to this user’s bank account.

Step 2B: Handle Webhooks

If you have an active webhook subscription (required in production & optional in Sandbox), you will receive the customer_funding_source_created webhook immediately after the resource has been created.

Production: Operational

Financial institutions play an important role in the Dwolla network.

Dwolla, Inc. is an agent of Veridian Credit Union and all funds associated with your account in our network are held in one or more pooled accounts at Veridian Credit Union. These funds may not be eligible for share insurance by the National Credit Union Share Insurance Fund. Dwolla, Inc. is the operator of a software platform that communicates user instructions for funds transfers to Veridian Credit Union.