Lee's Summit Paternity Attorney
Establishing Paternity in Jackson County, Missouri

Establishing legal paternity is what turns a biological father into a legal one. Until it happens, an unmarried father has no automatic right to custody, to parenting time, or to any say in his child's schooling or medical care — and the child has no automatic right to support or inheritance from him.

I handle paternity cases in the 16th Judicial Circuit for fathers and for mothers, agreed and contested. This page covers what the statutes actually say, how the process runs in Jackson County, and where these cases go wrong.

Why establishing paternity matters

Without a paternity finding there is no order for a court to enforce. Establishing it lets the court resolve three things in a single case:

• A parenting plan setting legal custody, physical custody, and the residential schedule.

• Child support calculated on Missouri's Form 14, with health insurance, uninsured medical expenses and work-related childcare allocated between the parents.

• Collateral issues — the birth certificate, the child's surname, the tax exemption, and inheritance rights.

It cuts both ways, and a father should understand this before he files: establishing paternity establishes the support obligation along with the rights.

The Missouri statutes that actually govern

Paternity runs on Missouri's Uniform Parentage Act, Sections 210.817 to 210.852, with a separate administrative track in Chapter 454. The details matter more than the summaries you will find elsewhere.

• Section 210.822 — presumptions. These are narrower than most people assume. Marriage to the mother with the child born during it, or within three hundred days after it ends, creates a presumption; so does an attempted marriage before birth. Being named on the birth certificate, or signing an acknowledgment filed with the bureau, creates a presumption only where the parents married or attempted to marry after the child was born — neither is a standalone trigger. A genetic test showing a probability of paternity of ninety-eight percent or higher also creates one. A presumption is rebuttable only by clear and convincing evidence.

• Section 210.826 — who may file, and when. Where the child already has a presumed father, the action may be brought at any time, by the child, the mother, the presumed father, a man alleging he is the father, anyone who has had physical or legal custody more than sixty days, or the Family Support Division.

• Section 210.828 — the limitations period. This applies only to a child who has no presumed father. There the action must be brought within eighteen years of birth, except that the child may bring it within three years after turning eighteen. Where a presumed father exists, Section 210.826 controls and there is no age cutoff at all. That distinction is routinely missed.

• Section 210.834 — genetic testing. The court may order testing of the child, the mother and the alleged or presumed father. Refusing is punishable as civil contempt and the refusing party's pleadings can be struck. A test excluding the man is conclusive of non-paternity.

• Section 454.485 — the administrative route. The Family Support Division may enter a paternity order during a support proceeding, but only where the man is already presumed to be the father under Section 210.822, or where both parents sign sworn statements. It is not a general power to adjudicate contested paternity.

The hospital acknowledgment, and the window that closes early

Most unmarried parents meet paternity first as a form at the hospital. Under Section 210.823, an acknowledgment signed under Section 193.215 constitutes a legal finding of paternity. It is not a preliminary step or a formality — it carries the effect of a finding without any court judgment.

It can be rescinded, but the window is the earlier of sixty days from the last signature, or the date of the first administrative or judicial proceeding relating to the child in which the signatory is a party. That second trigger is what catches people: a support proceeding can close the window before the sixty days have run.

After that it can be challenged only on fraud, duress, or a material mistake of fact, and the burden falls on whoever is challenging it. If you signed one and you have doubts, the calendar is the first thing to look at, not the merits.

What filing actually looks like in Jackson County

The sequence in the 16th Circuit is predictable:

• Petition. Either parent, or the Family Support Division, files a Petition to Establish Paternity asking the court to determine fatherhood and to resolve custody and support in the same case.

• Service and answer. The other parent is served and has thirty days to respond.

• Genetic testing, if paternity is disputed. Results are close to conclusive and usually end that question quickly.

• Parenting plan. Once paternity is established the court requires a plan covering legal and physical custody, the residential schedule, holidays and summers, transportation, and communication between the parents.

• Support. Calculated on Form 14. See Lee's Summit Child Support Attorney for how the inputs are fought over.

• Judgment of Paternity incorporating the parenting plan and the support order.

On costs: filing a Petition to Establish Paternity in Jackson County runs $144.50 on the current schedule. Service by a Jackson County deputy is $46.00 per person served, though I usually use a private process server instead — $100 to $120, depending on how many attempts it takes and how hard the other party is to locate. Civil filings also carry a $3.50 Juvenile Justice Preservation Fund surcharge. Genetic testing, where the court orders it, is additional. What a Divorce Costs, and How I Charge sets out my fees honestly.

The parenting plan is the part you will actually live with

Paternity is decided once. The parenting plan governs the next eighteen years — exchanges, holidays, who takes the child to the doctor, what happens when someone is late. Most of the post-judgment fights I see are not about the law; they are about a plan that was vague where it needed to be specific.

Custody is decided on the eight best-interest factors in Section 452.375.2, and since August 28, 2023 Missouri has presumed that equal or approximately equal parenting time is in the child's best interest, rebuttable only by a preponderance of the evidence. An unmarried father who establishes paternity starts from that same presumption. See Lee's Summit Child Custody Attorney and Missouri's 8 Best Interest Factors.

What Clients Say

I cannot thank Kirby Minor enough for his incredible representation. We recently received a court ruling completely in my favor after a intense trial for a high-conflict child custody modification case in Jackson County, and I couldn't be happier with the outcome. As a father, navigating the court system is incredibly stressful, but Kirby was brilliant. He was incredibly strategic from day one and completely commanded the courtroom at trial. If you are looking for a top-tier family law attorney in Lee's Summit or the greater Kansas City area who knows how to handle high-conflict custody disputes and truly fight for your family’s best interests, look no further. Highly recommend! (Jeff R.)

Kirby and I met by chance while I was in a vulnerable state and he helped my through a few rough situations. His professionalism, drive, passion, knowledge of the law, and dedication was made very evident when he walked me through 2 lawsuits that I felt completely defeated and turned out to be victories (not only monetarily, but victories in knowing my mind and heart were settled as well). I, not one time, had to call/text/email Kirby or worry about the status of a case because he always kept me abreast of every motion, denial, or change at hand. I am beyond grateful to have Kirby Minor by my side and know that he will always abide by the law and his expertise is beyond measure. In saying all of that, 1000% yes I would only recommend Kirby. (Jon C.)

Kirby Minor has been my attorney twice and he is the best lawyer. He is smart and trustworthy and he always calls back right away and keeps you informed about your case. He is knowledgeable and sharp in many different areas of the law. He is a very compassionate person and you do not find that in most attorneys. I would definitely recommend Kirby Minor as an attorney and you will not be disappointed. (Cheryl S.)

Highly recommended. Absolutely love Kirby!! Very professional and overall just a kind person... I had been trying to get divorced for 2 years.. found Kirby and it was done in 2 months. Best money I’ve ever spent and would totally use him again if needed. Thank you Kirby! (Jamie C.)

Common questions

What is the difference between signing an acknowledgment and filing a petition?

A voluntary acknowledgment is the fastest route when both parents agree, and under Section 210.823 it already constitutes a legal finding of paternity. A petition is required where there is disagreement or uncertainty, or where a parent wants custody, parenting time and support addressed at the same time — an acknowledgment alone does none of that.

How long does it take in Jackson County?

An agreed acknowledgment can be done in days. A contested petition with genetic testing typically runs three to six months, depending on the court's docket and how hard the case is fought.

Can custody and support be decided in the same case?

Yes, and they should be. Once paternity is established the Family Court can enter the parenting plan and the support order in the same proceeding. Splitting them across two cases costs money and time for no benefit.

Do I need a DNA test?

Not if both parents acknowledge paternity. If one disputes it, the court will almost always order testing under Section 210.834, and refusing carries real consequences — contempt, and the possibility of having your pleadings struck.

What if the other parent will not cooperate?

Either parent, or the Family Support Division, can file. The court can order genetic testing over one parent's objection.

Can an unmarried father get equal parenting time?

Once paternity is established he stands in the same position as any other father, including the benefit of the statutory presumption of equal or approximately equal parenting time. Establishing paternity is the gate; it is not the finish line.

I signed an acknowledgment and now I have doubts. Is it too late?

Possibly, and the answer turns on dates rather than on facts. Check the sixty-day rescission window and, more importantly, whether any proceeding involving the child has already been filed — that closes the window early. After it closes you are limited to fraud, duress, or material mistake of fact, and you carry the burden. This is worth a call sooner rather than later.

Do I need an attorney?

You can file without one. Whether you should depends on whether custody, parenting time or support are genuinely in dispute, and on whether the other side has counsel. In a truly agreed case with a simple schedule, I will tell you so.

A thirty-minute phone consultation is $100. I will tell you where you actually stand, what it is likely to cost, and whether you need a lawyer for it.

Call or text 816-888-0632.