Русско-англо-русский юридический словарь

Novation: substitution of a party to a contract; novated person takes over all rights and obligations under the contract (Basic Contract Law for Paralegals by Jeffrey A. Helewitz)

Moreover, although the substitution of a party to an agreement modifies the original agreement, the substitution will not, by itself, cause an extinctive novation unless the parties have expressly stated their intention to do so or there is a complete incompatibility. (Justia US Law)