FL-117 is a California family court form used as an alternative method of serving divorce, legal separation, annulment, or parentage documents. Instead of having a process server deliver the papers in person, the petitioner can mail the required documents along with the FL-117 form to the respondent. If the respondent signs and returns the form, it becomes proof that they voluntarily acknowledged receiving the legal papers. This method is often more convenient, less confrontational, and less expensive than personal service.
The form works by giving the respondent a formal notice that important legal documents have been sent to them and asking them to sign an acknowledgment confirming receipt. By signing FL-117, the respondent admits they received the summons, petition, and any other initial documents, and that they understand a family law case has been opened. It is important to note that signing FL-117 does not mean the respondent agrees with the petition—it only confirms they received the paperwork.
FL-117 must be mailed by someone who is at least 18 years old and not a party to the case. This neutral third party signs the “Proof of Service by Mail” portion, documenting when and where the documents were sent. The respondent then completes and signs the acknowledgment section and returns the form by mail. Once the petitioner receives the signed form back, it can be filed with the court as valid proof of service.
This form is especially useful when both parties are cooperating or maintaining civil communication. It avoids the need for personal service, which can sometimes be inconvenient, costly, or emotionally difficult. However, FL-117 only works if the respondent is willing to sign and return the acknowledgment. If they do not, the petitioner must use another legally authorized method of service.
In summary, FL-117 provides a simple and efficient way to complete service of process through the mail when the respondent is cooperative. When properly signed, returned, and filed, it serves as the official proof that the respondent received notice of the case. This allows the court to proceed and ensures both parties’ legal rights are protected as the family law case moves forward.

