Consensus facit legem: Consent makes the law. A contract is a law between the parties, which can acquire force only by consent.

Qui tacet consentire videtur: A party who is silent appears to consent.

Non videntur qui errant consentire: ​He who errs is not considered as consenting.

Disparata non debent jungi: Unequal things ought not to be joined.

Ei incumbit probatio qui dicit, non qui negat: The burden of the proof lies upon him who affirms, not he who denies.

Incerta pro nullis habentur: Things uncertain are considered as nothing.

Falsus in uno, falsus in omnibus: False in one thing, false in everything.

Quaelibet jurisdictio cancellos suos habet: Every jurisdiction has its boundaries.