California Code, Business and Professions Code - BPC § 7072.5

(a) Upon the issuance of a license, a plasticized pocket card of a size, design, and content as may be determined by the registrar shall be issued at no cost to each licensee, or to the partners, managers, officers, or responsible managing officers of licensees licensed as other than individuals, which card shall be evidence that the licensee is duly licensed pursuant to this chapter.  All cards issued shall be surrendered upon the suspension, revocation, or denial of renewal of the license, and shall be mailed or delivered to the board within five days of the suspension, revocation, or denial.

(b) When a person to whom a card is issued terminates his or her position, office, or association with a licensee that is licensed as other than an individual, that person shall surrender his or her card to the licensee and within five days thereafter the card shall be mailed or delivered by the licensee to the board for cancellation.