InvoiceAutomaticPaymentSource

Use a bank account on file as the automatic payment method. On the due date, Square charges the bank account for the amount of the payment request if the buyer has approved the payment. The buyer receives a request to approve the payment when the invoice is sent or the invoice is updated.

This payment method applies only to invoices that sellers create in the Seller Dashboard or other Square product. The bank account is provided by the customer during the payment flow.

You cannot set BANK_ON_FILE as a payment method using the Invoices API, but you can change a BANK_ON_FILE payment method to NONE or CARD_ON_FILE. For BANK_ON_FILE payments, the invoice delivery method must be EMAIL.