The person offering a thing other than money, by way of performance, must, if he means to treat it as belonging to the creditor, retain it as a depositary for hire, until the creditor accepts it, or until he has given reasonable notice to the creditor that he will retain it no longer, and, if with reasonable diligence he can find a suitable depositary therefor, until he has deposited it with such person.

SOURCE: CC § 1503.