The document identification method comprises: a step of marking the document with an anti-copy mark that is identical for a plurality of documents, a step of reading an anti-copy mark, a step of generating an identification mark that can vary from one document to another and according to the reading of the anti-copy mark and a step of marking said document to form said identification mark on said document. In embodiments the method comprises, in addition, a step of printing a uniform area and the step of marking the document to form the identification mark comprises a step of emitting light with a laser in the uniform area.In embodiments the method comprises, in addition, a step of invisibly marking the identification mark on said document.