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Overview

The most common scenario for this guide is to facilitate marketplace or peer-to-peer transfers between your customers. Funds Flow Facilitate Transfers In this guide, we’ll cover the key points of transferring money:
1

Create a Verified Customer who will receive the transfer

Create a Verified Customer in your application to act as the recipient of the funds.
2

Create an Unverified Customer who will send the transfer

Create an Unverified Customer who will initiate and send the funds.
3

Associate a verified funding source with the sender

Link and verify a bank or credit union account to the sender’s profile to enable sending funds.
4

Associate an unverified funding source with recipient

Link a bank or credit union account to the recipient’s profile (verification not required for receiving funds).
5

Transfer funds from the sender's funding source to the recipient's funding source

Initiate a transfer from the sender’s verified funding source to the recipient’s funding source using the Dwolla API.

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Before you begin

You need to have a Sandbox account already set up.

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Verified and Unverified Customers

Here are some rules to keep in mind:
  1. With a transfer of money, at least one party must complete the identity verification process, either the sender or the receiver. It’s your decision about which party completes this process, based on your business model, and you may want to have both parties complete the identity verification process.
  2. The sender must have a verified funding source. Unverified funding sources can only receive money, not send.
In this guide, we’ll create two Customers: one to represent a seller and one to represent a buyer. In this scenario, the seller, Jane Merchant, is a Verified Customer with an unverified funding source. The buyer, Joe Buyer, is an Unverified Customer with a verified funding source.
This is a suggested approach and there are other ways you can implement your marketplace transfers. For instance, both the sender and the receiver (or buyer and seller) could be Verified Customers, and both could have verified funding sources. Or, you could have the sender undergo identity verification but not the recipient.
Looking to learn more about each Customer type and how it relates to your funds flow? Take a look at our Customer types article for more information.

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Step 1 - Create a Verified Customer

First, we’ll create a Verified Customer for Jane Merchant. There are two types of Verified Customers you can create; Personal Verified Customers and Business Verified Customers. In this example, we use Business Verified Customers (sole proprietorship) to represent the merchant who will be receiving funds. 
POST https://api-sandbox.dwolla.com/customers
Content-Type: application/vnd.dwolla.v1.hal+json
Accept: application/vnd.dwolla.v1.hal+json
Authorization: Bearer 0Sn0W6kzNic+oWhDbQcVSKLRUpGjIdl/YyrHqrDDoRnQwE7Q

{
    "firstName": "Jane",
    "lastName": "Merchant",
    "email": "solePropBusiness@email.com",
    "ipAddress": "143.156.7.8",
    "type": "business",
    "dateOfBirth": "1980-01-31",
    "ssn": "6789",
    "address1": "99-99 33rd St",
    "city": "Some City",
    "state": "NY",
    "postalCode": "11101",
    "businessClassification": "9ed3f670-7d6f-11e3-b1ce-5404a6144203",
    "businessType": "soleProprietorship",
    "businessName":"Jane Corp",
    "ein":"00-0000000"
}

HTTP/1.1 201 Created
Location: https://api-sandbox.dwolla.com/customers/62c3aa1b-3a1b-46d0-ae90-17304d60c3d5
When the customer is created, you’ll receive the customer URL in the location header.
There are various reasons a Verified Customer will result in a status other than verified which you will want to account for after the Customer is created. Reference the Customer verification resource article for more information on handling verification statuses.

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Step 2 - Create unverified funding source

Next, we’ll add Jane Merchant’s bank or credit union account as an unverified funding source. Unverified funding sources can only receive funds, not send. The example below shows sample bank information, but you will include actual bank name, routing, and account numbers after prompting your customer for this information within your application. Possible values for bankAccountType can be either “checking” or “savings”. More detail is available in API docs. 
POST https://api-sandbox.dwolla.com/customers/AB443D36-3757-44C1-A1B4-29727FB3111C/funding-sources
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"
}

HTTP/1.1 201 Created
Location: https://api-sandbox.dwolla.com/funding-sources/375c6781-2a17-476c-84f7-db7d2f6ffb31
The created funding source URL is returned in the Location header.

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Step 3 - Creating an Unverified Customer

Now that we’ve created a customer for Jane Merchant and associated a funding source, we’ll do the same for Joe Buyer, but this time we’ll create an Unverified Customer, and a verified funding source which is capable of sending money. Provide the user’s full name, email address, and IP address to create the Customer. More detail is available in API docs.
Provide the IP address of the end user accessing your application as the ipAddress parameter. This enhances Dwolla’s ability to detect fraud.
POST https://api-sandbox.dwolla.com/customers
Content-Type: application/vnd.dwolla.v1.hal+json
Accept: application/vnd.dwolla.v1.hal+json
Authorization: Bearer 0Sn0W6kzNicvoWhDbQcVSKLRUpGjIdlPSEYyrHqrDDoRnQwE7Q
{
"firstName": "Joe",
"lastName": "Buyer",
"email": "jbuyer@mail.net"
}

HTTP/1.1 201 Created
Location: https://api-sandbox.dwolla.com/customers/247B1BD8-F5A0-4B71-A898-F62F67B8AE1C
When the customer is created, you’ll receive the customer URL in the location header.

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Step 4 - Attach a verified funding source

Next, you will create and attach a verified funding source to Joe Buyer, which will be done using Dwolla’s Open Banking solution with Visa, a leading Open Banking service provider that Dwolla partners with. This method will give Joe Buyer the ability to add and verify their bank account in a matter of seconds by authenticating using their online banking credentials. Once Joe Buyer reaches the page in your application to add a bank account, you will use Open Banking with Visa to authenticate their bank account. This involves initiating an with Dwolla, guiding the user through the verification process with their bank, and then using the details to create a funding source in Dwolla. To integrate Open Banking with Visa, we recommend checking out our integration guide. Additionally, if you would like to see a working example that verifies a bank using Open Banking with Visa and attaches it as a verified funding source to a Dwolla Customer, please check out our open-banking/visa integration example on our GitHub profile.

Step-by-step guide on implementing Open Banking with Visa

 Finally, once an instantly-verified funding source has been created via Open Banking with Visa, Joe Buyer is now set up and ready to send money!

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Step 5 - Initiating a transfer

POST https://api-sandbox.dwolla.com/transfers
Accept: application/vnd.dwolla.v1.hal+json
Content-Type: application/vnd.dwolla.v1.hal+json
Authorization: Bearer 0Sn0W6kzNicvoWhDbQcVSKLRUpGjIdlPSEYyrHqrDDoRnQwE7Q
{
    "_links": {
        "source": {
            "href": "https://api-sandbox.dwolla.com/funding-sources/80275e83-1f9d-4bf7-8816-2ddcd5ffc197"
        },
        "destination": {
            "href": "https://api-sandbox.dwolla.com/funding-sources/375c6781-2a17-476c-84f7-db7d2f6ffb31"
        }
    },
    "amount": {
        "currency": "USD",
        "value": "225.00"
    }
}

HTTP/1.1 201 Created
Location: https://api-sandbox.dwolla.com/transfers/d76265cd-0951-e511-80da-0aa34a9b2388

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Retrieve the status of your transfer

You can check the status of the newly created transfer by retrieving the transfer by its URL.
Request and response
GET https://api-sandbox.dwolla.com/transfers/d76265cd-0951-e511-80da-0aa34a9b2388
Accept: application/vnd.dwolla.v1.hal+json
Authorization: Bearer pBA9fVDBEyYZCEsLf/wKehyh1RTpzjUj5KzIRfDi0wKTii7DqY

...

{
  "_links": {
    "self": {
      "href": "https://api-sandbox.dwolla.com/transfers/D76265CD-0951-E511-80DA-0AA34A9B2388"
    },
    "source": {
      "href": "https://api-sandbox.dwolla.com/customers/AB443D36-3757-44C1-A1B4-29727FB3111C"
    },
    "destination": {
      "href": "https://api-sandbox.dwolla.com/customers/C7F300C0-F1EF-4151-9BBE-005005AC3747"
    }
  },
  "id": "D76265CD-0951-E511-80DA-0AA34A9B2388",
  "status": "pending",
  "amount": {
    "value": "225.00",
    "currency": "USD"
  },
  "created": "2015-09-02T00:30:25.580Z"
}
That’s it! You’ve successfully transferred money from Joe Buyer to Jane Merchant. Please continue to the Webhooks guide for information on implementing notifications for your customers about the transfer.