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 new alteration. R.L.1910, § 987.
Oklahoma Legal Code
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 new alteration. R.L.1910, § 987.