Abstract: A method for preventing unauthorized repeat purchases of a product includes: storing a plurality of purchase data values, each related to a completed financial transaction and including a purchase identifier; receiving an authorization request for a new financial transaction from an external system, the authorization request including a specific identifier; identifying a number of purchase data values where the included purchase identifier matches the specific identifier; and transmitting an authorization response to the external system, the authorization response including (i) an approval of the new financial transaction if the number of purchase data values is below a predetermined number, or (ii) a denial of the new financial transaction if the number of purchase data values is equal to or above the predetermined number.

Abstract: A method for preventing unauthorized repeat purchases of a product includes: storing a plurality of purchase data values, each related to a completed financial transaction and including a purchase identifier; receiving an authorization request for a new financial transaction from an external system, the authorization request including a specific identifier; identifying a number of purchase data values where the included purchase identifier matches the specific identifier; and transmitting an authorization response to the external system, the authorization response including (i) an approval of the new financial transaction if the number of purchase data values is below a predetermined number, or (ii) a denial of the new financial transaction if the number of purchase data values is equal to or above the predetermined number.

Abstract: The disclosure relates to methods and systems for reducing user interventions necessary for authentication of transactions. The disclosure involves (i) receiving from a merchant terminal device, a request for initiating an electronic payment transaction, (ii) retrieving one or more authentication waiver records associated with the transferor payment account, (iii) comparing transaction parameters extracted from the received request with transaction parameters defined in the retrieved one or more authentication waiver records, and (iv) responsive to identifying a retrieved authentication waiver record having transaction parameters that match the transaction parameters extracted from the received request, transmitting to an issuer server (a) an instruction for initiating transfer of the transaction amount, and (b) information identifying the initiated transfer of the transaction amount as exempt from a payor identity authentication requirement.