Family
Aug. 14, 2025
Common mistakes in family law matters: Pitfalls practitioners and courts should avoid
Family law cases are often costly, complex and emotionally charged, and common procedural mistakes -- from faulty proof of service to improper disclosures -- can delay justice, undermine fairness and even result in void orders that could have been avoided with proper training and preparation.





Patti C. Ratekin
Commissioner (ret.)
Signature Resolution
Family Law
Thomas Jefferson School of Law
Patti C. Ratekin is a retired San Diego County Superior Court Commissioner who is currently a Neutral with Signature Resolution. The original guide was initially compiled and edited in 2005 by the late San Diego Superior Court Judge Edward B. Huntington.

Family law matters can be very costly; when mistakes are made,
those costs can be even higher. Cases involving divorce, child custody and
property division are often complex and emotionally charged. They require
careful adherence to procedural and statutory requirements.
But despite the best intentions of courts, attorneys and self-represented litigants, mistakes are often made. These simple errors can compromise the integrity of proceedings, delay justice and even result in invalid, unenforceable and -- most tragically -- void orders.
Over the course of my family law career, including while serving
as a commissioner, I saw the same mistakes being made over
and over again, often with significant consequences for the parties.
These errors could -- and should -- have been avoided with proper training and
preparation.
In a series of columns, I will share with you errors I regularly witnessed in family law practice. My goal is to improve awareness and accuracy in family law adjudication and settlement. This column will focus on commonly made procedural missteps.
Proceeding without proof
of service
It is a fundamental misstep to try to move forward with hearings or rulings without valid proof of service. Family law proceedings require proper notice to all parties; without notice, due process is compromised and any resulting orders may be subject to challenge or reversal.
Proof of service lets the court know that the other party was
properly served with legal papers. It documents what papers were served, where
they were served and who served them. In divorce, child custody and support cases, proof of service
establishes that the other party is aware of the legal proceedings and that the
court has jurisdiction.
In County of San Diego v. Gorham (2010) 186 Cal.App.4th 1215, the appellate court held
that a judgment entered without proper service of process is void as a matter
of law. Due process, the court said, requires notice and an opportunity to be
heard before a party can be deprived of property. Because Gorham had not been
properly served and had no actual notice of the lawsuit until after judgment
was entered, the default judgment had to be vacated. Sadly, the custodial
parent -- or, more precisely, the County acting on behalf of the custodial
parent -- was deprived of the default child support judgment that had previously
been entered against Gorham.
Under
Rule 5.66 of the Rules of Court, parties must file with the
court a completed form showing that the other party received a petition or
complaint or a response to a petition or complaint. And it must be the correct
form: FL-115 *or other form including the FL-330 for service of summons, FL-335
for service by mail, DV-200 for personal service in domestic violence cases, or
POS-050/EFS-050 for electronic service. When utilizing service by way of a
Notice and Acknowledgement of Receipt, FL-117, it is mandatory that it be
attached to an FL-115.
Incomplete
or incorrect information, service by a party, an under-age server, service by a
felon, the wrong type of service for the document, or forgetting to deliver the
completed form to the court -- all of these can have devastating effects for the party
and invalidate the whole effort. Without service, the court lacks jurisdiction
over the party being served, due process is denied that party and the case
should not move forward. If the court fails to notice defects with proof of
service and allows the case to proceed, serious problems can arise. A client
may be denied a benefit they believed they had obtained by virtue of having
legal representation.
Mishandling joinder procedures
When third parties will be affected by a family proceeding, they must be officially joined as parties by the court. Until this happens, the claimant cannot be served.
Family cases often implicate interests outside the family unit. These might include individuals who have physical custody of minor children, persons who claim custody or visitation rights, others who assert claims against marital property, or retirement plans and other financial holdings of the parties.
Under Rules of Court
5.24, the court issues a joinder order and directs that a summons
(form FL-375) be issued. The claimant -- who is served with a copy of the Notice
of Motion and Declaration for Joinder (form FL-371) with the pleading
attached, the order of joinder and the summons -- has 30 days to file a
response.
A common mistake in a joinder, other than one involving a
retirement plan, is that the person seeking joinder may fail to file the
pleading related to the third party's interest, such as claims to custody or
property rights -- in essence, a civil complaint.
Improper bifurcation without Preliminary Declarations of Disclosure
Another common error is bifurcating marital status -- granting
divorce -- prematurely, before a Preliminary Declaration of Disclosure (PDD) has
been served or the written agreement to delay service under Family Code
Section 2337 has been filed with the court.
The point of
disclosure in family law matters is to make sure that spouses are aware of
everything each owns and owes, separately and together, so that assets and
debts can be divided equitably. Disclosure also gives parties the financial
information they need to make decisions about child and spousal support and
attorney fees.
California law requires that a PDD be served on a spouse or domestic partner before divorce can be granted. Bifurcating marital status without a PDD is improper and may render the bifurcation defective.
Entering into stipulations dividing property without service or Waiver of Final Declarations of Disclosure
Family Code Section 2105 provides that, absent a court order for good cause, before or at the time the parties enter into an agreement for the resolution of property (other than for temporary use) or support issues (other than pendente lite support), each party or their attorneys must serve on the other party a final declaration of disclosure and, unless waived (FL-144), a current income and expense declaration.
Pursuant to Family Code Section 2107(d), with limited exceptions, if a court enters a judgment but the parties have failed to comply with their disclosure requirements, "the court shall set aside the judgment." However, AB 459, enacted as part of the 2009 Stats, provides that if the complying party voluntarily waives receipt of the noncomplying party's PDD, the court will set the judgment aside only at the request of the complying party - unless the motion to set aside is based on fraud or perjury. The safest practice is to serve or waive the Final Declaration of Disclosure before entering any stipulation dividing property.
Declarations of Disclosure do not have to be filed with the court but proof of service of the document must be. Service can be done personally by mail; service may also be done electronically if both parties are represented by counsel or if there is a stipulation to serve electronically where one party is self-represented.
Settlements without proper
disclosures
Parties cannot validly waive PDD, and settlement or trial cannot proceed without either a Final Declaration of Disclosure (FL-141) or a valid waiver (FL-144) on file. Skipping this step undermines transparency and may invalidate agreements.
To effectuate disclosure, parties must complete a Declaration of Disclosure (FL-140), a Schedule of Assets and Debts (FL-142) or a Community Property Declaration (FL-160) and Separate Property Declaration (FL-160), an Income and Expense Declaration (FL-150), a Service of Declaration of Disclosure (FL-141), and, if appropriate, a Stipulation and Waiver of Final Declaration of Disclosure (FL-144) signed by both parties.
If the spouse is participating, by filing a Response, they will also have to complete and serve a PDD and either serve or waive the Final Declaration of Disclosure.
The requirements for service of Declarations of Disclosure can
be found on the FL-182 Judgment Checklist. Under Rules of Court
5.405, the court may not require any additional forms or
attachments.
Errors in service by posting
or publication
Sometimes parties have difficulty locating individuals whom they wish to initially serve, and they will request a court order allowing them to post or publish notice instead of directly serving papers. If the court orders service by posting or publication, it must ensure that the Summons box is correctly checked. Failure to check the correct box may render the service invalid. Posting is only allowed if the party qualifies for a Fee Waiver.
Posting or publishing other documents, including but not limited to Requests for Orders or declarations, is improper under Code of Civil Procedure Section 415.50.
Invalid stipulations to subject
matter jurisdiction
Parties commonly believe that they can establish subject matter jurisdiction through mutual agreement. They may even stipulate to this in a document drafted by their attorneys. Any such agreement, however, is void.
Subject matter jurisdiction is a legal requirement established by law -- not by agreement -- and any attempt to create jurisdiction through stipulation, waiver or estoppel is void.
Entry of judgment of legal separation
When parties enter into a Judgment of Legal Separation and do not check the box for "Reserving Jurisdiction over termination of marital or domestic partnership status," they must file a new case if they later decide to terminate their marital status. This will require them to file a new petition and also to follow the disclosure requirements in Family Code Section 2104 et. seq.
There are two common ways this mistake plays out:
The parties litigate all issues in the new case. The only issue in the
new case should be termination of marital
status. Issues related to custody, property or
other matters in the judgment of legal
separation should have been litigated in the
earlier case.
The parties try to call the original proceeding a status judgment, but it
cannot actually be a
status judgment. Under Family Code
Section 2337, status‑only judgment must
expressly reserve jurisdiction for later determination of any pending issues.
In the new petition, there are no other issues left for determination in the
later filed case.
The parties have an absolute right to reserve jurisdiction in a legal separation case in order to terminate their marital status later in the same case. However, they need a mechanism as to how this will occur, such as by stipulation of the parties, by filing a Request for Order, by giving notice by certified mail return receipt requested signed only by the party, or by any other mechanism upon which they can agree.
Conclusion
Procedure in family law cases is complicated, and mistakes are made on a regular basis -- by parties, counsel and even judges. Heightened attention to these and other common mistakes in family law proceedings can significantly improve the efficiency, fairness and enforceability of these proceedings.
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