California Code
TITLE 5 - EXTINCTION OF CONTRACTS
CHAPTER 3 - Modification and Cancellation

Section 1697. - 1697. A contract not in writing may be modified in...

Section 1698. - 1698. (a) A contract in writing may be modified by...

Section 1699. - 1699. The destruction or cancellation of a written contract, or...

Section 1700. - 1700. The intentional destruction, cancellation, or material alteration of a...

Section 1701. - 1701. Where a contract is executed in duplicate, an alteration...