According to a first aspect of the invention, there is provided a system for collection of products, the system comprising: at least one carrier (8) for carrying products (40); a collection point (14), at which collection point a user (10) of the system can remove products from the carrier; and a transporter arrangement (16, 20) for transporting the carrier to the collection point; wherein the system is arranged to physically inhibit (42) removal of the carrier by the user from the collection point.