Civ. Code, § 880.310

(a) If the time within which an interest in real property expires pursuant to this title depends upon recordation of a notice of intent to preserve the interest, a person may preserve the person’s interest from expiration by recording a notice of intent to preserve the interest before the interest expires pursuant to this title. Recordation of a notice of intent to preserve an interest in real property after the interest has expired pursuant to this title does not preserve the interest.

(b) Recordation of a notice of intent to preserve an interest in real property does not preclude a court from determining that an interest has been abandoned or is otherwise unenforceable pursuant to other law, whether before or after the notice of intent to preserve the interest is recorded, and does not validate or make enforceable a claim or interest that is otherwise invalid or unenforceable. Recordation of a notice of intent to preserve an interest in real property creates a presumption affecting the burden of proof that the person who claims the interest has not abandoned and does not intend to abandon the interest.