Method of identifying a container (1) obtained by a process comprising the following steps: (A) starting from a blank (2) of the container (1), at least part of the said container (1) is formed (B) a two-dimensional or three-dimensional marking zone (4) , the temperature of which is maintained at a value below the glass transformation temperature of the constituent substrate, is provided in or on the substrate of the blank (2) and, in the said marking zone (4), an identification code (5) is reproduced by illumination (6) of the said marking zone (4) with at least one beam (7) of coherent monochromatic localized electromagnetic radiation to which the substrate is at least partially transparent, the said beam (7) being operated and controlled in order to remove or modify the constituent substrate of the wall (3) and to leave the identification code (5), in positive or negative form, in the said wall so that the said code is readable and (C) at least the said marking zone (4) is annealed so as at least to reduce the differences in internal tension in the substrate between the said marking zone (4) and the rest of the said wall (3) .Linvention concerne un procédé permettant didentifier un récipient (1), obtenu selon un procédé comprenant les étapes suivantes: (A) sur la base dune ébauche (2) du récipient (1), au moins une partie dudit récipient (1) est formée (B) une zone de marquage (4) bidimensionnelle ou tridimensionnelle, dont la température est maintenue à une valeur inférieure à la température de transition vitreuse du substrat constitutif est placée dans ou sur le substrat de lébauche (2) et, un code didentification (5) est reproduit dans ladite zone de marquage (4), par exposition (6) de la dite zone de marquage (4) à au moins un faisceau (7) de rayons électromagnétiques localisés monochromes cohérents, par rapport auxquels le substrat est au moins en partie transparent, ledit faisceau (7) étant actionné et régulé afin denlever ou de modifier le substrat constit
