Exoneration
The removal of a burden, charge, responsibility, duty, or blame imposed by law. The right of a party who is secondarily liable for a debt, such as a surety, to be reimbursed by the party with primary liability for payment of an obligation that should have been paid by the first party.
Additional topics
Law Library - American Law and Legal InformationFree Legal Encyclopedia: Estate for years to Ex proprio motu (ex mero motu)