A transaction request may be initiated and completed using a vehicle based communication system. A vehicle may include a wireless tag or transponder, and a wireless system at a service station or fuel station can detect the presence of the wireless tag in a predefined wireless service area. The wireless system can transmit location information based on the detected location of the wireless tag or vehicle to the wireless tag. A communication device may establish a communication connection with a wireless tag or transponder, and through the communication connection, the wireless tag can transmit the location information received from the wireless system to the communication device. The requester may use the communication device to provide or enter transaction information. The communication device can transmit the transaction information for transaction authorization, and in response to authorization of the transaction, a transaction authorization indication may be transmitted to a point of sale.