If more than one consumer has signed a consumer contact, the seller may comply with Section 1799.202 by mailing or delivering the copy to any one of the consumers who reside at the same address. A copy shall also be mailed or delivered to any other consumer who has signed the consumer contract and who does not reside at the same address.
Source:
Section 1799.204, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CIV§ionNum=1799.204..