Abstract: At least one image, such as a QR code, taken by a camera of a mobile computing device is received. The at least one image includes an identifier of a location dependent good or service associate with the image. The location dependant service may be a service for using a parking space or charging an electric vehicle. The identifier is automatically extracted from the image, and a user is identified to pay for the good or service. The user may self identify himself by providing payment details, such as an account number, username, or login details, or the user may be automatically identified from his phone number, IP address, MAC address or any other unique user identifier. Thereafter, an account associated with the user, such as a debit or credit card account, is billed for the location dependent good or service associated with the extracted identifier.

Abstract: A request to authorize a payment transaction initiated on the client device is received by the system. In some embodiments, the request is received from a mobile client device connected to a cellular communications network. The request includes an IP address associated with a client device and a cellular phone number associated with the client device. The IP address is determined automatically without human intervention from the request. A cellular telephone carrier system associated with the cellular communications network is then queried using the cellular phone number associated with the client device. A response is received from the carrier system. The response includes the current IP address associated with the client device. The payment transaction is authorized when the IP address received from the carrier system matches the IP address received from the client device.