What is Contra Formam Feofifa-menti?

Legal Definition
In old English law. A writ that lay for the heir of a tenant, enfeoffed of certain lands or tenements, by charter of feoffment from a lord to make certain services and suits to his court, who was afterwanis distrained for more services than were mentioned in the charter. Reg. Orig. 176; Old Nat Brev. 162
-- Black's Law Dictionary