California Code, Code of Civil Procedure - CCP § 411.20.5

If an electronic filing is made to the clerk by an electronic filing service provider acting as the agent of the court for purposes of collecting and remitting filing fees, and fees owed to the electronic filing service provider remain unpaid for a period of five days after notice to the attorney of record, and the filing was made by the attorney of record and not a self-represented party, the electronic filing service provider may notify the clerk that fees remain unpaid despite notice to the attorney of record. The clerk may then notify the attorney of record that the attorney of record may be sanctioned by the court for nonpayment of fees. The court may sanction the attorney of record if the fees to the electronic filing service provider remain unsatisfied 20 days after notice by the clerk.