Abstract: The invention concerns a method for processing postal packets including managing digital impressions of the postal packets. In a method for processing postal packets, during a preliminary sorting of the packets, a digital image of a packet comprising an address information is formed, a digital impression (V-Id) is derived from said image which constitutes a logical identifier for the packet and the packet impression is recorded in memory corresponding to data indicating the packet address information, and during a second sorting of the packets, a digital image of a current packet is formed again (51) comprising an address information, a digital impression for the current packet is derived (52) from said image and a search is performed among the recorded impressions in the preliminary sorting for a match with the current packet impression. During the preliminary sorting, the impressions of successive packets are associated in memory with corresponding chronological serial numbers.