Cal. CIV § 1531

Novation is made: 1. By the substitution of a new obligation between the same parties, with intent to extinguish the old obligation; 2. By the substitution of a new debtor in place of the old one, with intent to release the latter; or, 3. By the substitution of a new creditor in place of the old one, with intent to transfer the rights of the latter to the former.