Hello Kevin,

What's a "key off" batch? I'm not familiar with the term.

If the same document number is used for the cash receipt (such as the cheque number), then the second cash receipt will not post. You cannot have duplicate document numbers for a client. If the document number are different, then you must be able to post the cash to account for a customer paying an invoice twice.

If the second payment was just a duplicate keying of the same payment, then you can correct the problem by entering an adjustment transaction.