Abstract: A method of recording an interaction with a mail item. The mail item comprises a product contained in a mailing package. The mailing package comprises an interface surface containing mailing information. The interface surface has coded data indicative of a mail item identity and of coordinates of a plurality of locations of the interface surface. The method includes the steps of: receiving, in a computer system, indicating data from a sensing device regarding the mail item identity and positions of the sensing device relative to the interface surface; and identifying and recording, with reference to the indicating data, the interaction with the mail item.