53-8-6. Oral contract--Alteration in writing by consent of parties.
A contract not in writing may be altered in any respect by consent of the parties, in writing, without a new consideration, and is extinguished thereby to the extent of the alteration.
Source: CivC 1877, §968; CL 1887, §3592; RCivC 1903, §1286; RC 1919, §907; SDC 1939, §10.0805.