Exceptio Law and Legal Definition

Exceptio is an exception, plea, defense or an objection. It is a Roman law pleading corresponding to the plea of the common law.

In Roman law, it is an exception or defense available to a person who is being sued for non-performance of contractual obligations that s/he can defend by proving that the plaintiff did not perform their side of the bargain.

In civil law, a defendant’s plea admitting the claim, but alleging that new facts exist that negate the complaint. It is also a defense to a complaint that is justly brought but that unjustly accuses the particular defendant named.