Fide Jussio
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
An act by which any one binds himself as an additional security for another. This giving security does not destroy the liability of the principal, but adds to the security of the surety. Vicat.; Halifax, Anal. bk.
2, c. 16, note 10.