Abstract: A security system for mounting a coin-collecting container in an operating position on a housing provided in a coin-processing machine. The system may incorporate integral locking means which can be positioned at a plurality of locking stations on the machine housing, to thereby adapt the system for a variety of non-processing machines. In one embodiment, the system is adapted to freely receive a coin of maximum size in the opened position and to lock against the discharge of a coin of minimum size in a locked position. Means are also provided to improve security by using high-strength materials at critical shear points, and by using spring-biasing forces to positively lock the system components in a secure position.