A method of sorting mailpieces, in which the mailpieces are sorted automatically in a sorting system with a view to being delivered to a recipient by a mail carrier, and are fed back into a sorting machine for additional sorting in order to re-sequence the mailpieces in a certain classification established by the recipient. This method is characterized by the following steps: the sorting system transmitting to the recipient digital images corresponding to respective ones of the mailpieces to be delivered to said recipient, these digital images being associated in the transmission with the unique mailpiece identifiers (Id tags) generated by the sorting system, with a view to said unique mailpiece identifiers being reorganized relative to one another by the recipient into an order that defines said classification; and controlling the sorting machine so that it performs the additional sorting of said mailpieces on the basis of said unique mailpiece identifiers as reorganized into said classification established by the recipient.