Jus tertii

Jus tertii (Latin, “third party rights”) is the legal classification for an argument made by a third party (as opposed to the legal title holder) which attempts to justify entitlement to possessory rights based on the showing of legal title in another person. By showing legitimate title in another person, jus tertii arguments imply that the present possessor’s interest is illegitimate or that the present possessor is a thief.