Abstract: The primary package for containing the product is provided with a label carrying or constituting the trademark of the product, while the secondary package for containing the primary package includes a “main” coded mark (5) enabling it to be identified at the time of sale. In accordance with the invention, another mark referred to as an “auxiliary” mark is applied to said label for the purpose of individualizing the product contained in the primary package, this auxiliary mark, which corresponds to another code (6), being written in very small characters that are not naturally readable but that can be read by means of a reader device specially adapted for this purpose, the codes (5, 6) being related by a one-to-one relationship, and being input into a computer database (8) on the packaging line itself so that by comparing the marks it is possible to verify whether the two packages do indeed correspond.

Abstract: In a method for the making of a secured document, a layer of bonder is prepared on at least one face of the document; one or more information elements and/or images are printed on a first face of an information transfer sheet; the first face of the information transfer sheet is applied to the layer of bonder of said face of the document. In this way, the information elements are printed on a transfer sheet that has no layer of bonder and yet there are obtained information elements that get merged into the layer of bonder.