Creating receipts for invoices and credit memos through lockbox

Hello.

We currently using lockbox and the standard BAI2 transmission format to send the receipt details, including receipt number and amount, in record 4 and then the applicable to this receipt invoice details, such as invoice number and application amount in the overflow record 6.

Our business now wants to start including the credit memos (example: invoice for $12, credit memo for -$2, and then receipt amount should be $10)

The way we configured our current transmission format, it looks like we will not be able to use it for this scenario because we explicitly pass the invoice application amount in the overflow record, and we cannot pass credit memo with a negative application amount. Is this a correct assumption?