- A promise or undertaking, founded on a consideration.
This promise may be oral or in writing not under seal. It may be
express or implied. - An action to recover damages for a breach or
nonperformance of a contract or promise, express or implied, oral or in
writing not under seal. Common or indebitatus assumpsit is brought for
the most part on an implied promise. Special assumpsit is founded on an
express promise or undertaking.