Apparatus for assisting in merging postal articles with a stack of mailpieces that have already been sorted into a certain sequence, said apparatus comprising a merge table suitable for storing the stack of mailpieces on edge, a first camera suitable for forming a digital image of a current postal article to be merged with the stack of mailpieces, a second camera that observes the stack of mailpieces in the manner of an operator placed at one end of the merge table, and a monitoring and control unit with a display screen that is placed at the end of the merge table.