A self-service terminal for reading wireless tags incorporated into media items is described. The terminal comprises a media acceptor for receiving media items, such as banknotes incorporating an RFID tag, and a wireless tag reader for reading received media items incorporating wireless tags. The terminal may also include a wireless tag reader for reading wireless tags in media items that are being transported to determine if multiple superimposed media items are present. The terminal may include a wireless tag reader for reading wireless tags in media items presented as a bunch, and subsequently retracted, to determine if any of the presented media items had been removed.