Why is it if you apply a cash payment to an invoice and post it and by mistake a few days later you have a key off batch not posted and then proceed to post the key off batch. It won't generate a error batch to show that the invoice was paid twice. Once by the cash payment and the other by keying it off. which in turn gives you a negative number for the invoice.

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.

A key off batch is under the cash that you use a computer generated check # and apply it to the invoice. its almost the same as posting a cash payment. if you have a customer with a line of credit you can apply the line to specfic invoices that is what i call a key off