CA Fam Code Section 243

(a)

If a petition under this part has been filed, the respondent shall be personally served with a copy of the petition, the temporary restraining order, if any, and the notice of hearing on the petition. Service shall be made at least five days before the hearing.

(b)

On motion of the petitioner or on its own motion, the court may shorten the time for service on the respondent.

(c)

If service on the respondent is made, the respondent may file a response that explains or denies the allegations in the petition.