(a) When a debt secured by a mortgage, deed of trust, or by lien retained in a deed of conveyance of land or bill of sale, or other instrument, has been fully paid or satisfied, the mortgagee, transferee, or assignee of the mortgagee or the legal holder of the debt secured by deed of trust or lien, who has received payment or satisfaction of the debt, must satisfy the record by a formal deed of re