Abstract: A system and related method for use in facilitating transactions in communication networks is provided. The system includes a mobile device configured to send and receive information over a wireless communication network. The mobile device may include a short-range wireless facility. A service provider subsystem may process identity verification requests and otherwise facilitate transactions between a mobile device user and a seller of items or services. Verification and/or facilitation functions may begin with a request from a mobile device to purchase an item or service from a seller. The request may include information identifying a user of the mobile device. Based on this information, the service provider may verify the identity of the user. An indication of this verification may be sent to the mobile device and/or the seller using a network connection. Using similar techniques, other transaction-related functions may be performed, including billing/credit card functions, delivery functions, etc.