A method (500, 600, 700, 800) comprising - obtaining (501, 601) a first identifier (LockID), which is associated with at least one person, from a delivery agent or the person or a portable electronic communication device of the delivery agent or the person, at a control unit of a compartment system which, in addition to the control unit, has a plurality of compartments (3,4) provided with respective locks and lock control units which are respectively assigned to the compartments (3, 4) and are configured to communicate with the control unit, wherein the control unit has a user interface, - obtaining (521, 615), at the control unit, after obtaining the first identifier (LockID), information indicating that one compartment of the plurality of compartments (3, 4) has been closed or that at least one shipment from or for the person has been placed in one compartment of the plurality of compartments (3, 4) and the compartment has been closed, wherein the information is obtained from a lock control unit assigned to the compartment, and wherein the information is detected using one or more sensors, which are part of the lock control unit or communicatively connected to the lock control unit, and - causing (523, 617), by the control unit, storing of the first identifier (LockID) in the lock control unit assigned to the compartment, wherein the causing (523, 617) of the storing of the first identifier (LockID) in the lock control unit assigned to the compartment is caused by the obtaining (521, 615) of the information indicating that the compartment of the plurality of compartments (3, 4) has been closed or that at least one shipment from or for the person has been placed in a compartment of the plurality of compartments (3, 4) and the compartment has been closed, or wherein the causing (523, 617) of the storing of the first identifier (LockID) in the lock control unit assigned to the compartment is caused by the obtaining (521, 615) of the information indicating that the compartment of the plurality of compartments (3, 4) has been closed or that at least one shipment from or for the person has been placed in a compartment of the plurality of compartments (3, 4) and the compartment has been closed, and the causing (523, 617) is only carried out under the additional condition that, as a further factor, information indicating that an additional interaction with the user interface has taken place, has been obtained. - obtaining (501, 601) a first identifier (LockID), which is associated with at least one person, from a delivery agent or the person or a portable electronic communication device of the delivery agent or the person, at a control unit of a compartment system which, in addition to the control unit, has a plurality of compartments (3,4) provided with respective locks and lock control units which are respectively assigned to the compartments (3, 4) and are configured to communicate with the control unit, wherein the control unit has a user interface, - obtaining (521, 615), at the control unit, after obtaining the first identifier (LockID), information indicating that one compartment of the plurality of compartments (3, 4) has been closed or that at least one shipment from or for the person has been placed in one compartment of the plurality of compartments (3, 4) and the compartment has been closed, wherein the information is obtained from a lock control unit assigned to the compartment, and wherein the information is detected using one or more sensors, which are part of the lock control unit or communicatively connected to the lock control unit, and - causing (523, 617), by the control unit, storing of the first identifier (LockID) in the lock control unit assigned to the compartment, wherein the causing (523, 617) of the storing of the first identifier (LockID) in the lock control unit assigned to the compartment is caused by the obtaining (521, 615) of the information indicating that the compartment of the plurality of compartments (3, 4) has been closed or that at least one shipment from or for the person has been placed in a compartment of the plurality of compartments (3, 4) and the compartment has been closed, or wherein the causing (523, 617) of the storing of the first identifier (LockID) in the lock control unit assigned to the compartment is caused by the obtaining (521, 615) of the information indicating that the compartment of the plurality of compartments (3, 4) has been closed or that at least one shipment from or for the person has been placed in a compartment of the plurality of compartments (3, 4) and the compartment has been closed, and the causing (523, 617) is only carried out under the additional condition that, as a further factor, information indicating that an additional interaction with the user interface has taken place, has been obtained.