Abstract: Methods and systems of deferred presentment for the purchase of goods and/or services. One arrangement includes a Point Of Sale (POS) device combined with a check reader and/or imaging device for receiving and storing check instrument data (e.g., amount, date of presentment, routing number) and customer identifying information (e.g., a customer PIN). A database of previous check writing experience and activity may be accessed to determine whether or not a current check instrument is to be verified. Choosing to proceed with execution of a verified check instrument may include a guarantee component that serves to credit a merchant or other party with funds in the event that a check instrument fails to clear a bank.