Account.makePayment, and using AutoBill.makePayment. (You may also enter a payment through the Subscribe Portal.)
A merchant-entered payment is applied to outstanding AutoBills with a PaymentMethod of “Merchant Recorded Payment.” Unless otherwise specified by the Merchant, Subscribe credits the Account’s AutoBills as follows:
- A manually entered payment is applied first to the oldest outstanding AutoBill.
- Any remaining monies are applied to the next oldest AutoBill, until the payment is exhausted, or all AutoBills have been paid.
- Any monies left after all AutoBills have been paid appear as a credit to the account.
makePayment method on the AutoBill object to apply a payment directly to an outstanding AutoBill. To make a payment to the oldest open invoice, use Account.makePayment instead.
If a payment fails at the financial institution, or if you wish to reverse a payment for other reasons, use reversePayment on the corresponding object to reverse a payment entered using makePayment.

