Cal. Bus. & Prof. Code § 8018

Any natural person holding a valid certificate as a shorthand reporter, as provided in this chapter, shall be known as a “certified shorthand reporter.” Except as provided in Section 8043, no other person, firm, or corporation may assume or use the title “certified shorthand reporter,” or the abbreviation “C.S.R.,” or use any words or symbols indicating or tending to indicate that he, she, or it is certified under this chapter.