Abstract: A sheet delivery apparatus (10) in the form of an accessory adapted to be secured to a printing machine (11). The apparatus comprises a sheet receiver (12) arranged to co-operate with the printing machine to receive one or more sheets output by the printing machine, and sheet delivery system (18, 19) for presenting the one or more sheets to a user, the sheets being partially fed by the sheet delivery means through a security gate and deflector system to enable removal of the sheet or sheets by the user. The sheet delivery system is controlled so as to withdraw sheets from access by the user if the sheets have not been removed after a predetermined time has elapsed and to deflect them into an internal secure bin, with the security gate and deflector system being provided by a dual function dual position shutter and deflector member.