California Proof of Service for Petition or Application — Health and Safety Code 11361-— - Adult Crimes is a document used to prove that a petition or application related to adult crimes has been properly served. This document must be signed by the person who served the petition or application and must include the date, time, and manner of service. There are two types of California Proof of Service for Petition or Application — Health and Safety Code 11361-— - Adult Crimes: Personal Service and Substituted Service. Personal Service requires the person making service to personally hand deliver a copy of the petition or application to the other party. Substituted Service requires the person making service to deliver the petition or application to someone of suitable age and discretion at the party’s residence.