Abstract: A method for successively closing and opening a container fitted with a lock, wherein the lock furthermore comprises memory means, and wherein the container is locked at a loading location by carrying out the following steps: transmitting an identification code of the container to a central verification device via the communication means; transmitting a closing code to the memory means of the lock, via the communication means, by the central verification device; and closing the lock; and wherein the container is opened at an unloading location by carrying out the following steps: transmitting an identification code of the container to said central verification device via the communication means; transmitting an opening code to the memory means of the lock, via the communication means, by the central verification device; comparing the opening code with the closing code; and opening the lock.