California Codes, Code of Civil Procedure - CCP, Part 2 — Of Civil Actions, Title 5 — Jurisdiction and Service of Process, Chapter 4 — Service of Summons, Article 5 — Proof of Service, Section 417.40
(a) Any proof of service which is signed by a person registered under Chapter 16 (commencing with Section 22350) of Division 8 of the Business and Professions Code or the person’s employee or independent contractor shall indicate the county in which the person is registered and the number assigned to the person pursuant to Section 22355 of the Business and Professions Code.
(b) This section shall remain in effect only until January 1, 2027, and as of that date is repealed.
Notes
Requires proof of service signed by a registered process server, the server's employee, or independent contractor to state the county where the server is registered and the assigned registration number. Sets the requirement to remain effective only until January 1, 2027, and to be repealed on that date.
Use as reference
Lexinter.net | California Code, Code of Civil Procedure - CCP § 417.40 | https://laws.lexinter.net/codes/california/code-of-civil-procedure/part-2/title-5/chapter-4/article-5/section-417-40