A method of opening a security housing that requires authorization and unlocking moves the printing module transversely by a transverse mover into an additional unlocked position, as a result of which, the security housing or an access thereto is unlocked. The configuration has a mechanical locking or element and a printing module. The printing module is mounted such that it can be moved transversely to the transporting direction, for mechanically releasing the lock of a security-housing part directly or indirectly, by the security-housing part only being released once an additional security-housing part has been unlocked. The latter has a locking element that is disposed in the interior of the security housing and can be actuated by the printing module.