Cal. Bus. & Prof. Code § 25509.1
(a) Commencing January 1, 2026, and except as provided in subdivision (b) and paragraph (3) of subdivision (c), payment from a retailer licensee to a wholesaler licensee for delivery of beer, wine, or distilled spirits shall be made by electronic funds transfer in accordance with the following requirements:
(3) Any costs related to electronic payment services shall be paid by the party that incurred those costs.
(b) A payment may be made using cash, check, or money order only in the following instances:
(c)