Abstract: The invention relates to a quality control method for two-dimensional matrix codes on metallic workpieces, said codes consisting of stamped marking dots. The stamping process for the marking dots is carried out by a marking tool (17) with the aid of predetermined digital positional data. The corresponding image data is then recorded for analysis by means of the image processing device (22), exclusively at the locations that have been predetermined by the positional data, or additional image data that has been previously generated is also used for the analysis, to establish whether a correct marking dot with the required quality characteristics is present.