Marking is an operation designed to establish a permanent, irrevocable boundary between two contiguous properties. It often becomes necessary when a dispute arises as to the location of a boundary. Marking can be done amicably, when the owners agree on the line separating their respective properties, or legally, if the parties are unable to reach an agreement. In this latter case, the land surveyor recommends the line he or she believes would be best, based on the evidence available.

If the parties accept the land-surveyor's recommendations, he or she can mark out the line. A marking minute is then prepared, and is signed by the parties and the land surveyor before being published at the registry office. After publication, marking can be set up against third parties.