Section 1088.5.

Cal. Code of Civil Procedure - CCP § 1088.5.
in effect
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In a trial court, if no alternative writ is sought, proof of service of a copy of the petition need not accompany the application for a writ at the time of filing, but proof of service of a copy of the filed petition must be lodged with the court prior to a hearing or any action by the court.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026

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