Controlling deposition and retrieval of shipments via an electronic locker unit communicatively coupled to a managing distribution centre, and having lockable compartments, comprises entering an identification code of the shipment and retrieving specific information including a weight P0 associated with the shipment; opening a compartment of the electronic locker unit; depositing the shipment inside the compartment; weighing the shipment with a weighing module located inside the compartment and comparing the measured weight P with a reference weight;—and locking the compartment and logging the compartment as filled and successfully locked upon close match and validation of weight comparison, said reference weight is an authorized weight interval between a minimal weight Pmin and a maximal weight Pmax determined by cumulating at least the two following: a carrier weight tolerance T1 corresponding to the weight P0 provided by the carrier, and a locker weight tolerance T2 of the scales of the weighing modules.