Positive pay is a fraud prevention service offered by banks. It's a helpful tool for businesses against check fraud. Businesses can provide their banks with a list of checks issued with the check number, date, and amount. So when a check is presented at the bank, they are compared with the list of authorized checks. If anything pops up, the company will receive an alert and can decide to return or pay the check if no checks are cashed with a statement, This check clears positive pay.