When a man has the possession as well as the right of property, he is said to have jus duplicatum-a double right, forming a complete title.

Explanation

(English-origin maxim.) When a claimant holds both the right of possession and the right of property, he holds an unassailable title that prevails over all challengers.

Where this applies

• A landowner holds both the deed and has been living on the property for thirty years — no one can challenge his title because he has both the right and the possession.
• A woman inherits a family farm and also physically occupies it, giving her an unassailable double right that defeats any competing claimant.
• A man who bought a house at auction and immediately moved in holds both the legal title and actual possession, making his claim the strongest possible.