A more thorough explanation:

Definition: Procurationes ad resignandum in favorem (pronounced prok-yuh-ray-shee-oh-neez ad rez-ig-nan-duhm in fuh-vuh-ruhm) is a Latin legal term that refers to procuratories of resignation in favor of the disponee of a vassal. This phrase was used to describe the rule that required a vassal to resign before a superior could receive the disponee of a vassal to the property.

Examples: In medieval times, when a vassal wanted to transfer his land to someone else, he had to first resign his rights to the land to his lord. This was done through a legal document called a procurationes ad resignandum in favorem. Once the lord received the document, he could then accept the new owner of the land.

For example, if a vassal named John wanted to give his land to his son, he would have to first resign his rights to the land to his lord through a procurationes ad resignandum in favorem. Once the lord received the document, John's son could then be accepted as the new owner of the land.

This legal term is no longer used today, but it provides insight into the complex feudal system of medieval Europe.