Jus Tertii

Jus tertii, the right or title of a third person. in Scots Law normally, a tertius has no title to enforce a contract even though he may have an interest that it is carried out. But when a contract shows that the object of the parties to it was to advance the interests of a tertius, and the teritus is named, then a jus qu'situm tertio is created which gives the tertiusa title to sue.