- Ubberime fide – In utmost good faith.
- Ubi jus ibi remedium – Wherever there is a right, there is a remedy/For every wrong there is a remedy.
- Ubi non est principalis, non potest esse accessorius – Where there is no principal, there can be no accessory.
- Ubi nullum matrimonium, ibi nulla dos es – Where there is no marriage, there is no dower.
- Ultra vires – Beyond the scope, power or authority.
- Utile per inutile non vitiatur – What is useful is not vitiated by the useless.
