Cal. Bus. & Prof. Code § 17550.17
(c) Upon payment in full by the passenger for air or sea transportation and any related services with a check, the seller of travel shall issue and deliver the ticket or voucher to the passenger or his or her designated agent within 72 hours of the earlier of the following:
(e) If the seller of travel is unable to issue tickets or vouchers upon payment as set forth in subdivisions (b) and (c), the seller of travel may comply with this section by taking either of the following actions: