Black's Law Dictionary (2nd edition)dictionaries

Do Ut Facias

Lat I give that you may do; I give [you] that you may do or make [for me.] A formula In the civil law, under which those contracts were classed in which one party gave or agreed to give money, in consideration the other party did or performed certain work. Dig. 19, 5, 5; 2 Bl. Cqmm. 444

Source: Black's Law Dictionary 2nd Ed (1910)