Credit card transaction authorization is performed using ad-hoc, short-range wireless links to obtain item identification information from items that include ad-hoc short range wireless link transmitters and that are carried by a user who is associated with a prospective credit card transaction. Authorization information for the prospective credit card transaction is generated based on the item identification information that was obtained. Location information for a wireless terminal that is associated with the user and/or Internet Protocol (IP) address information for a transaction terminal that is associated with the transaction may also be used. Related systems, devices and computer program products are also described.