A commendation ceremony (commendatio) is a formal ceremony that evolved during the Early Medieval period to create a bond between a lord and his fighting man, called his vassal. The first recorded ceremony of commendatio was in 7th century France, but the relationship of vassalage was older, and predated even the medieval formulations of a noble class. The lord's "man", might be born unfree, but the commendatio freed him.
When two men entered into a feudal relationship, they underwent the ceremony. The purpose of the commendation was to make a chosen person a vassal of a lord. The commendation ceremony is composed of two elements, one to perform the act of homage and the other an oath of fealty. In some countries, such as the Kingdom of Sicily, the commendation ceremony came to be referred to as investiture.