Cal. Pen. Code § 474
Every person who knowingly and willfully sends by telegraph or telephone to any person a false or forged message, purporting to be from a telegraph or telephone office, or from any other person, or who willfully delivers or causes to be delivered to any person any such message falsely purporting to have been received by telegraph or telephone, or who furnishes, or conspires to furnish, or causes to be furnished to any agent, operator, or employee, to be sent by telegraph or telephone, or to be delivered, any such message, knowing the same to be false or forged, with the intent to deceive, injure, or defraud another, is punishable by imprisonment in a county jail not exceeding one year, or by imprisonment pursuant to subdivision (h) of Section 1170, or by a fine not exceeding ten thousand dollars ($10,000), or by both that fine and imprisonment.
Ca. Pen. Code § 474