additional-consideration rule.Employment law. An exception to the employment-at-will
principle, whereby an employee who does not have a written contract but who undertakes
substantial hardship in addition to the normal job duties — as by relocating to a different city
based on oral assurances of job security — can maintain a breach-of-contract claim if the
employer does not fulfill its agreement. [Cases: Master and Servant 3(1), 4.C.J.S.
Employer–Employee Relationship §§ 22–26, 42.] [Blacks Law 8th]