In an action for unlawful detainer, the fee for service of a summons, complaint, and prejudgment claim of right to possession pursuant to Section 415.46 of the Code of Civil Procedure shall be the amount described in Section 26720.9 for all occupants not named in the summons. The fee is not refundable.
Source:
Section 26721.1, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=26721.1..