term:

Fidei Commissum

fidei commissum n

pl: fidei com·mis·sa [-sə, -sÄ ]
[Latin fidei commissum, from neuter past participle of fideicommittere to bequeath (a thing) with the request that it be delivered to a third person, from fidei, dative of fides trust + committere to place in the hands of, entrust]
in the civil law of Louisiana
: a gift (as by will) of property in which a person is invested with title and which the person is directed to convey to another person or to make a particular disposition of compare substitution NOTE: Fidei commissa are prohibited by the Louisiana Civil Code.

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.