The process server must fill out and sign the proof of service form, which shows how, when, and where the papers were served, and who received them. Complete proof of service of petition and summons with notice and acknowledgment of receipt.Include date and city of mailing (example: Fresno). You must also check either box 3 or box 4, whichever applies. Jessica Ryan Keeney is licensed to practice law in the State of California. (Business) a person at least 18 years of age who was apparently in charge at the office or usual place of business of the respondent. It's highly unlikely that the Court would send you that notice without a Proof of Service having been filed. The California Judicial Council Proofs of Service forms may be filled in online, then printed out for signature. The California Judicial Council Proofs of Service forms may be filled in online, then printed out for signature. The Proof of Service is a document that lets the court know that a party was served with court documents.