- Quid turpi ex causa promissum est non valet
- A promise which is founded upon an immoral consideration is not binding.
Ballentine's law dictionary. Anderson, W.S.. 1998.
Ballentine's law dictionary. Anderson, W.S.. 1998.
quid turpi ex causa promissum est non valet — /kwid tarpay eks koza pramisam est non vaslat/ A promise arising out of immoral circumstances is invalid … Black's law dictionary