A duplicate request ID is an error that occurs when the same information transaction request is submitted within the duplicate transaction time frame. Generally, the transaction window is set for two minutes and the data that is matched for validation are card number, expiry date, type of transaction, bank account number, routing number, amount, invoice number, customer ID, full customer name, full address, purchase order serial number and the duplicate window. Hence the duplicate request ID is the ticket for a transaction with identical information made within few minutes.