CA Civ Proc Code Section 1993.2

If a person arrested on a civil bench warrant issued pursuant to Section 1993 fails to appear after being released on a promise to appear, the court may issue another warrant to bring the person before the court or assess a civil assessment in the amount of not more than one thousand dollars ($1,000), which shall be collected as follows:

(a)

The assessment shall not become effective until at least 10 calendar days after the court mails a warning notice to the person by first-class mail to the address shown on the promise to appear or to the person’s last known address. If the person appears within the time specified in the notice and shows good cause for the failure to appear or for the failure to pay a fine, the court shall vacate the assessment.

(b)

The assessment imposed under subdivision (a) may be enforced in the same manner as a money judgment in a limited civil case, and shall be subject to the due process requirements governing defense of actions and collection of civil money judgments generally.