Sections 44-8-3 to 44-8-5 , inclusive, do not preclude the use, affect the validity, or control the interpretation of other forms of real estate mortgages or assignments or satisfactions thereof; but all such instruments, whether on standard form or not, must show the name and post office address of the mortgagee or assignee. Source: RC 1919, § 1567; SDC 1939, § 39.0301.