Custody & parenting ยท Paternity
St. Louis Paternity Lawyer
When parents are not married, nothing about custody, parenting time, or child support can be ordered until paternity is legally established. We handle paternity cases in St. Louis for fathers who want a role in their child’s life, mothers who need support, and anyone who needs to confirm or contest parentage.
The first question most people ask
How is paternity established in Missouri?
Three ways. A child born to married parents is presumed to be the husband’s. For unmarried parents, both can sign an Affidavit Acknowledging Paternity, at the hospital or later, which has the effect of a judgment. Otherwise, either parent, the child, or the state can bring a paternity action under Missouri’s Uniform Parentage Act, where the court orders genetic testing and enters a judgment of parentage.
Why it matters for the father
Being named on the birth certificate, paying for things, or living with the child does not by itself give an unmarried father legal rights. Until a court enters a custody and parenting time judgment, he has no enforceable right to see the child, no say in school or medical decisions, and no standing to object if the mother moves. A paternity judgment is the first step; a parenting plan in the same case is the second.
Missouri’s custody factors apply the same way to unmarried parents, including the presumption in favor of shared parenting time. A father who files early and proposes a specific plan is in a far stronger position than one who waits. See custody and parenting plans and when to hire a paternity lawyer in Missouri.
Why it matters for the mother and the child
Without a paternity judgment or acknowledgment, there is no enforceable child support order, no right to add the child to the father’s health insurance, and no claim to Social Security, veterans, or inheritance benefits through the father. Once paternity is established, the court calculates support on Form 14 like any other case and can, in some circumstances, order support back toward the child’s birth.
A paternity action can be filed at any time before the child turns 18, and a child can bring their own action later. The Family Support Division can also open a case to establish paternity when a parent applies for services. See establishing paternity for unmarried parents and the legal steps for establishing paternity.
Testing, acknowledgments, and disputes
When parentage is in question
Most paternity cases are not contested; the parents simply need the judgment so custody and support can follow. The ones that are contested turn on timing and testing.
Genetic testing
In a court action, either party can request testing and the court will order it. A result showing a high probability of paternity creates a presumption that the man is the father, and the test is done through an accredited lab with a documented chain of custody so it holds up in court. An at-home kit is useful for peace of mind but is not evidence.
Undoing an acknowledgment
A signed Affidavit Acknowledging Paternity can be rescinded within a short window after signing. After that, it can be challenged only on grounds such as fraud, duress, or material mistake of fact, and the burden is on the person challenging it. A man who signed without being sure should act quickly.
The married presumption
A child born during a marriage, or within 300 days after it ends, is presumed to be the husband’s child. That presumption can be rebutted with genetic testing in a court action, but it has to be done; a divorce judgment that lists the child as a child of the marriage will carry support and custody consequences for the husband unless parentage is addressed in the case.
The child’s name
The court can order the child’s surname changed as part of the paternity judgment when it finds that is in the child’s best interests. It is not automatic in either direction, and it is a frequent point of disagreement; the court weighs the child’s relationship with each parent rather than tradition.
How it works
One case: parentage, custody, and support together
A Missouri paternity action is not just a declaration. The same judgment sets the parenting plan and the support order, so the case is prepared like a custody case from the start.
1
Petition and testing
The petition is filed in the circuit court where the child lives. If parentage is not admitted, the court orders genetic testing, usually completed within a few weeks.
2
Parenting plan and Form 14
Each parent files a proposed parenting plan and income information. Most St. Louis area courts send the parents to mediation on the plan, and most plans settle there.
3
Judgment of paternity, custody, and support
The court enters one judgment covering parentage, the parenting plan, and support with income withholding. It is enforceable and modifiable like any other family court judgment.
Parents who agree can skip the fight, not the judgment. An agreed paternity case with a mediated parenting plan is often finished in a few months with no contested hearing. David is on the St. Louis County Family Court’s Court Approved Mediator List.
Common questions
Paternity questions we hear most
I am on the birth certificate. Do I still need a paternity case?
If you signed an Affidavit Acknowledging Paternity, parentage is established, but you still have no custody or parenting time order. A custody case is needed to get an enforceable parenting plan. If you were listed without signing the affidavit, parentage itself may not be legally established and a paternity action is the fix.
Can the mother refuse a paternity test?
Not once a court orders it. In a paternity action the court can order the mother, the child, and the alleged father to submit to genetic testing, and a party who refuses can face consequences, including the court resolving the question against them.
Can I get custody or parenting time before paternity is decided?
Courts can enter temporary orders while the case is pending, including temporary parenting time, particularly where the parents do not actually dispute parentage. Ask for it in the petition rather than waiting for the final judgment.
Can the father be ordered to pay support for the years before the case?
In some circumstances. Missouri allows the court to order support retroactive to the filing of the petition, and in a paternity case it can reach further back for expenses such as the birth and the child’s necessities, depending on the facts and the time elapsed. It is case-specific and worth raising early.
What if I am not the father but signed the acknowledgment?
Act fast. There is a short rescission period after signing; after it closes, the acknowledgment can be set aside only by showing fraud, duress, or material mistake of fact in court, usually with genetic testing. The longer a man waits, and the more he has acted as the father, the harder it becomes. See ten mistakes to avoid in a Missouri paternity case.
Rights and support start with one judgment. Let us get it entered.
If you need to establish, confirm, or contest paternity in St. Louis, call or reach out online to schedule a confidential consultation. We will tell you what the court needs and how custody and support fit into the same case.
This page provides general information and is not legal advice. Every case is different, and outcomes depend on specific facts and circumstances. Part of our custody and parenting practice. See all family law practice areas.