Automatically apply open credits
: Mark this checkbox to have the application automatically apply open credit amounts (receipts, credit memos, or write-offs) to a client’s invoice when you save the invoice. When you save the invoice, the application will apply the full credit amount, or a portion of the amount equal to the invoice if the invoice amount is less than the open credit amount. Oldest credits are applied first.
This checkbox is available only if you do not have the approval process enabled for billing. You can automatically apply open credits with Detail Billing, Quick Bill, Standard Bill, recurring bills, and integrated invoices.