We are are trying to integrate with Dwolla + Plaid to enable money transfers between our customers. In order to do this I am testing out setting up funding sources using Dwolla’s Plaid integration as detailed here.
I am able to complete this for a single account fine, and I am able to add multiple funding sources to a customer as long as they are accounts from the same bank. However if I try to add a funding source for Account X from Bank A, and then a funding source for Account Y from Bank B I get an error;
Message: Bank already exists
This would indicate that Dwolla only supports customers having funding sources from a single bank, is this the case?
For context, this is using both the Plaid and Dwolla sandbox environments.