Cal. Civ. Code § 1624
(a) The following contracts are invalid, unless they, or some note or memorandum thereof, are in writing and subscribed by the party to be charged or by the party’s agent:
(b) Notwithstanding paragraph (1) of subdivision (a):
(1) An agreement or contract that is valid in other respects and is otherwise enforceable is not invalid for lack of a note, memorandum, or other writing and is enforceable by way of action or defense, provided that the agreement or contract is a qualified financial contract as defined in paragraph (2) and one of the following apply:
(2) For purposes of this subdivision, a “qualified financial contract” means an agreement as to which each party thereto is other than a natural person and that is any of the following:
(3) There is sufficient evidence that a contract has been made in any of the following circumstances:
(D) There is a note, memorandum, or other writing sufficient to indicate that a contract has been made, signed by the party against whom enforcement is sought or by its authorized agent or broker.
For purposes of this paragraph, evidence of an electronic communication indicating the making in that communication of a contract, or a confirmation, admission, note, memorandum, or writing is not insufficient because it omits or incorrectly states one or more material terms agreed upon, as long as the evidence provides a reasonable basis for concluding that a contract was made.