All OneClickReturn.com codes are generated via a proprietary system which instantly recognizes if they are valid or not. Each ID can only be linked to one product, itself linked to one owner. This means that the origin of the product may be confirmed simply by registering its ID.
In the event the One Click Return system does not recognize an ID number at registration, then one would know instantly that the item is a fake.
In the event the system recognized an ID number as Already registered, then one could infer that a valid ID number has been illegally copied by counterfeiters.