The invention relates to a safe device for collecting coins. It comprises a support receiving a coin box comprising a hatch controlled by an internal mechanism. The coin box comprises includes a locking means making it possible to authorize its introduction and its extraction in the support. The locking means making it possible to authorize the internal mechanism to open the hatch. The internal mechanism acts on the hatch by opening it when the locking means authorizes it and the coin box is introduced into the support; and by holding it closed otherwise. The subject of the invention is also a safe method for emptying coin boxes. The invention is applied to the transfer of coins without contact.