California Civil Code
(a) In addition to any other right under law to rescind a contract, an owner has the right to cancel such a contract until midnight of the fifth business day, as defined in subdivision (e) of Section 1689.5, after the day on which the owner signs a contract that complies with Section 2945.3.
(b) Cancellation occurs when the owner gives written notice of cancellation to the foreclosure consultant by mail at the address specified in the contract, or
by facsimile or electronic mail at the number or address identified in the contract.
(c) Notice of cancellation, if given by mail, is effective when deposited in the mail properly addressed with postage prepaid. If given by facsimile or electronic mail, notice of cancellation is effective when successfully transmitted.
(d) Notice of cancellation given by the owner need not take the particular form as provided with the contract and, however expressed, is effective if it indicates the intention of the owner not to be bound by the contract.