Paternity cases are about more than a name on a birth certificate. They can affect a child’s financial support, health insurance, inheritance rights, medical history, parenting time, custody, decision-making, and sense of stability. For parents, a paternity case can also bring up deeply personal questions about responsibility, identity, fairness, and the future of the parent-child relationship.
At Addair Law, we understand that these cases can be emotional. Some parents are trying to protect a child’s right to support. Some are trying to build a meaningful relationship with their child. Others are responding to a paternity claim, questioning genetic parentage, or trying to understand the legal effect of a voluntary acknowledgment signed at or near the time of birth.
Our mission is Protecting Clients with Compassion. That means we help clients understand the law, organize the facts, and make thoughtful decisions without judgment, pressure, or unrealistic promises.
If you need help establishing, challenging, or understanding paternity in Manhattan, Riley County, Pottawatomie County, Geary County, or the surrounding Kansas communities, Addair Law can help you evaluate your options.
What Is Paternity Under Kansas Law?
Paternity is the legal determination of a father-child relationship. Once paternity is legally established, it can create important rights and responsibilities for both the parent and the child.
Kansas paternity law is governed by the Kansas Parentage Act, K.S.A. 23-2201 through K.S.A. 23-2225. The Act addresses how parent-child relationships are established, when a father may be presumed to be a child’s legal father, when genetic testing may be ordered, how voluntary acknowledgments work, and what orders a court may enter after parentage is determined.
One important principle appears in K.S.A. 23-2206: the parent-child relationship applies equally to every child and every parent, regardless of the parents’ marital status. In practical terms, a child’s legal rights should not depend on whether the parents were married when the child was born.
A paternity case may be needed when parents were not married, when there is disagreement about parentage, when a parent needs child support established, when a parent wants custody or parenting time orders, or when there is a question about whether a prior acknowledgment of paternity should be revoked.
How Paternity May Be Established in Kansas
Under K.S.A. 23-2207, the parent-child relationship may be established in different ways depending on the parent involved. A mother-child relationship may be established by proof that the mother gave birth to the child or under the Kansas Parentage Act. A father-child relationship may be established under the Act or, if there is no final judgment establishing paternity, through a voluntary acknowledgment of paternity that meets statutory requirements and has not been revoked. An adoptive parent-child relationship may be established by proof of adoption.
In many cases, paternity is established in one of three ways:
First, paternity may be presumed under Kansas law. K.S.A. 23-2208 identifies circumstances when a man is presumed to be a child’s father.
Second, paternity may be acknowledged voluntarily. A voluntary acknowledgment of paternity can have serious legal consequences and should not be signed casually or under pressure.
Third, paternity may be determined through a court case, and can include genetic testing, if requested.
Each path can affect support, custody, parenting time, birth records, and future legal rights. The right approach depends on the facts.
Why Establishing Paternity Matters
Establishing paternity can benefit a child in many ways. It may help secure child support, health insurance, Social Security benefits, inheritance rights, access to family medical history, and a legally recognized relationship with both parents.
For a parent, paternity can also create the legal foundation to seek custody, parenting time, and involvement in major decisions affecting the child. Without legally established parentage, a biological connection alone may not resolve practical issues such as parenting schedules, school decisions, medical consent, or support enforcement.
At the same time, paternity creates legal responsibilities. A parent may be ordered to pay support, contribute to medical expenses, follow court-ordered parenting arrangements, and comply with future orders involving the child.
A paternity case should be approached with care because the outcome can affect the child and both parents for years.
Presumptions of Paternity
K.S.A. 23-2208 identifies several situations where a man may be presumed to be a child’s father. The table below should help you better understand the presumptions that Kansas law creates.
Presumptions of Paternity Table
Basis for Presumption
What Triggers It
Marriage at birth
Man and mother were married when the child was born
Marriage ended shortly before birth
Child was born within 300 days after the marriage ended by death, annulment, or divorce
Attempted marriage
Certain attempted (but legally invalid) marriages, as defined by statute
Birth certificate
Man is named as the father on the birth certificate with his consent
Written acknowledgment
A written acknowledgment of paternity meeting statutory requirements
Voluntary acknowledgment
A signed and unrevoked voluntary acknowledgment of paternity
Support obligation
Man has a legal obligation to support the child, whether voluntary or court-ordered
Existing support order
An existing court order requiring the man to pay child support
Genetic testing
Genetic test results show a 97% or greater probability of paternity
Note: A presumption may be rebutted only by clear and convincing evidence, by a court decree establishing another man's paternity, or as otherwise provided by statute. If more than one presumption applies to different men, Kansas law directs the court to weigh which is supported by the stronger considerations of policy and logic, including the child's best interests.
This is one reason paternity cases can become complex. The legal issue may not be as simple as whether a genetic test exists. The court may need to consider marriage, acknowledgments, prior orders, birth records, timing, the child’s best interests, and the legal status of more than one possible parent.
Voluntary Acknowledgment of Paternity
A voluntary acknowledgment of paternity can be a helpful tool when both parents agree on parentage. It can allow parentage to be recognized without a contested court case. But it is also a serious legal document.
K.S.A. 23-2204 requires acknowledgment of paternity forms to include written information about the rights and responsibilities that come with acknowledging paternity. Those disclosures include that an acknowledgment can create a permanent father-child relationship that can only be ended by court order. The statute also explains that both parents may have responsibilities for care and support, rights involving custody and parenting time unless changed by court order, rights to consent to medical treatment unless changed by court order, and potential inheritance or benefit-related consequences for the child and parents.
The statute also makes clear that each parent has the right to sign or not sign an acknowledgment and the right to speak with an attorney before signing.
If there is uncertainty, pressure, conflict, or incomplete information, it is wise to get legal advice before signing. Once signed, an acknowledgment can affect child support, custody, parenting time, and legal parentage.
Challenging or Revoking Paternity
Paternity can sometimes be challenged, but deadlines and legal standards matter. Under K.S.A. 23-2209, certain actions may be brought to determine the existence of a father-child relationship. A child, or a person acting on behalf of a child, may bring an action at any time to determine a presumed father-child relationship. If the relationship is not presumed under K.S.A. 23-2208, the action may generally be brought until three years after the child reaches the age of majority.
K.S.A. 23-2209 also addresses revocation of a voluntary acknowledgment of paternity. In general, the man named as father, the mother, or the child may bring an action to revoke the acknowledgment until one year after the child’s date of birth, with special timing rules when a person signed as a minor. The person seeking revocation may need to prove that the acknowledgment was based on fraud, duress, or material mistake of fact unless the request is filed within the shorter early-revocation period described in the statute.
The legal responsibilities arising from the acknowledgment, including child support, generally are not suspended during the revocation action unless the court finds good cause.
These cases require careful attention. A person who believes an acknowledgment was signed because of mistake, pressure, or false information should not assume the issue can be fixed informally. A court order may be necessary.
Genetic Testing in Kansas Paternity Cases
Genetic testing is often central in paternity cases, but it must be handled properly. K.S.A. 23-2212 provides that when paternity is at issue in a court case involving the child, mother, and alleged father, the court shall order genetic testing upon its own motion or upon the motion of any party. If a party refuses to submit to testing, the court may resolve the paternity issue against that party or enforce its order when justice requires.
The statute also addresses expert testing, written reports, challenges to the validity of genetic test results, and when test results may be admitted into evidence without additional foundation testimony.
Kansas law also recognizes that genetic test results showing a 97% or greater probability of paternity can create a presumption of paternity under K.S.A. 23-2208.
Genetic testing can provide important clarity, but it is not the only issue the court may need to decide. Depending on the facts, the court may also address voluntary acknowledgments, prior support orders, birth certificates, custody, parenting time, and child support.
What Orders Can the Court Enter in a Paternity Case?
Once the court determines that a parent-child relationship exists, the case may move beyond the question of parentage. K.S.A. 23-2215 provides that a judgment or order determining the existence or nonexistence of the parent-child relationship is generally determinative for all purposes, subject to the statutory limits when necessary parties have not been joined.
The court may also order a new birth certificate if the court’s determination differs from the existing birth certificate and the necessary parties are before the court. K.S.A. 23-2222 addresses birth registrations after paternity orders and provides for confidentiality of the original birth certificate and related findings except in limited circumstances.
K.S.A. 23-2215 also provides that when the court adjudges a party to be the parent of a minor child, the court shall make provisions for support and education of the child under Kansas child support law. The court may order either or both parents to pay support and education expenses. The court may also address necessary medical expenses related to the child’s birth.
If both parents are parties to the action, K.S.A. 23-2215 directs the court to enter orders regarding custody, residency, and parenting time as the court considers to be in the child’s best interests. If the parents have an agreed parenting plan, the statute creates a presumption that the agreed plan is in the child’s best interest, although the court may make a different order with specific findings.
If the parents do not agree, each party may need to submit a proposed parenting plan for the court’s consideration.
Temporary Orders While a Paternity Case Is Pending
Some paternity cases cannot wait until the final hearing for every issue to be addressed. K.S.A. 23-2224 allows the court to make certain temporary or interlocutory orders during a paternity case.
Depending on the circumstances, the court may restrain parties from interfering with each other’s privacy or rights, confirm existing de facto custody of the child, appoint an expert for genetic testing, require tissue samples for testing, or enter other appropriate orders under the Kansas Parentage Act.
The statute also specifically addresses electronic tracking or acquiring tracking information to determine another person’s location, movement, or travel patterns. That language can matter in high-conflict cases where privacy, safety, or harassment concerns are present.
Temporary orders can shape the practical reality of the case while the legal issues are pending. They may affect where the child lives, how support is paid, how testing occurs, and how the parties interact.
Why It Can Matter to Start a Paternity or Parentage Case Early
In many situations, it is better to address paternity and parentage issues early in a child’s life rather than waiting until conflict arises years later. Under K.S.A. 23-2215(f), when a Kansas court enters an original child support order in a parentage case, the court may award an additional judgment to reimburse the mother or another party who made expenditures for the child’s support and education from the child’s date of birth to the date the order is entered. If paternity is based on a presumption under K.S.A. 23-2208, the court may award reimbursement from at least the date the presumption first arose.
A recent Kansas Court of Appeals decision illustrates how significant this issue can become. In In re Parentage of M.R., No. 127,847, filed July 25, 2025, the Court of Appeals affirmed a retroactive child support award of more than $82,000 in a parentage case. The opinion noted that the Kansas Parentage Act permits retroactive awards of support from the child’s date of birth and that a parent’s duty to support a minor child generally is not waived simply because the other parent waited to pursue support.
That means a delayed paternity or parentage case can create serious financial consequences. A parent who is ordered to pay support may face not only current child support, but also a judgment for past support or birth-related expenses. If that judgment remains unpaid, statutory judgment interest may also become an issue. The Kansas Secretary of State publishes the applicable judgment interest rate each year under K.S.A. 16-204, and that rate can change annually. For a parent who waits years to address paternity, support, and parenting orders, the arrearage can become a difficult financial hole to work out of.
Early court involvement can help both parents understand their rights and responsibilities, establish support in a more orderly way, and create a clearer structure for the child’s care.
Paternity and Pregnancy-Related Support Under Kansas Law
Kansas law now recognizes that questions about parentage and financial responsibility may arise before a child is born. Effective July 1, 2025, House Bill 2062 amended the Kansas Parentage Act to include an unborn child within its definition of a child for purposes of establishing a legal parent-child relationship. This creates a basis for parentage and related support issues to be addressed during pregnancy. Kansas Legislature: HB 2062
When legal parentage is established, a Kansas court may enter a judgment for qualifying expenses dating back to conception. This form of prenatal support is different from the ordinary monthly child support ordered after a child is born. The award cannot exceed the mother’s direct medical and pregnancy-related expenses, and the statute excludes expenses associated with an elective abortion. Interest may accrue if an ordered amount remains unpaid. K.S.A. 20-165
The person requesting prenatal support must provide evidence of the expenses. The court may determine whether the expenses are reasonable and may adjust the amount after considering the income and circumstances of both parties. Establishing who is legally responsible for those expenses can make the timing and handling of a paternity case especially important.
Why Court Orders Matter When Parenting Time Breaks Down
A paternity or parentage case is not only about child support. It can also be essential for mothers and for fathers who have been acting as the child’s de facto primary residential parent. Without a court order establishing legal parentage, custody, residency, and parenting time, there may be no enforceable schedule for law enforcement to follow if one parent refuses to return the child.
This can be frightening for the parent who has been providing the child’s day-to-day care. If there is no court order identifying who has primary residential placement, when parenting time begins and ends, and what each parent is required to do, law enforcement may be unable to treat the situation as a violation of a parenting order because no parenting order exists. A written court order gives parents, courts, and law enforcement a clearer framework. It can reduce confusion, help prevent power struggles, and provide a formal path for enforcement if a parent refuses to follow the schedule.
For many families, establishing paternity or parentage early is not about creating conflict. It is about protecting the child’s stability and making sure both parents understand the rules before a crisis happens.
Paternity FAQ Section
Do I have to sign a voluntary acknowledgment of paternity? No. Under K.S.A. 23-2204, each parent has the right to sign or not sign, and the right to speak with an attorney before signing. An acknowledgment can create a permanent father-child relationship that can only be undone by court order, so it should never be signed under pressure or without understanding what it means.
Can I get a DNA test if the other parent won't agree? Yes. Under K.S.A. 23-2212, once paternity is at issue in a court case involving the child, mother, and alleged father, the court must order genetic testing on its own motion or on request of either party. If someone refuses to submit to testing, the court can resolve the paternity question against that person or enforce the order.
How long do I have to challenge or revoke a paternity acknowledgment? Generally, an action to revoke a voluntary acknowledgment must be brought within one year of the child's date of birth, with different timing rules if the signer was a minor. After that, revocation typically requires proof of fraud, duress, or material mistake of fact. If the father-child relationship isn't presumed under K.S.A. 23-2208, a broader action to determine parentage can generally be brought until three years after the child turns 18.
Does establishing paternity automatically give me custody or parenting time? Not automatically. Establishing paternity creates the legal foundation to seek custody, residency, and parenting time, but the court still must enter separate orders on those issues under K.S.A. 23-2215 — based on the child's best interests, or an agreed parenting plan if both parents submit one.
What happens if I don't respond to a paternity case in Kansas? Ignoring a paternity case doesn't stop it. The court can still enter orders on parentage, support, and custody without your input, and a support obligation can be applied retroactively to the child's date of birth. Responding early gives you a voice in decisions that will affect you and the child for years.
Can child support be ordered retroactively, before paternity is even established? While child support cannot be established until the Court makes a finding of paternity (either through admission or as a result of genetic testing), once paternity has been established the Court may make child support retroactive. Under K.S.A. 23-2215(f), when a Kansas court enters an original child support order in a parentage case, it can award reimbursement for support and education expenses back to the child's date of birth — or from when a presumption of paternity first arose. A recent Court of Appeals case affirmed a retroactive award of more than $82,000, so waiting to address paternity can create real financial exposure.
How Addair Law Helps
At Addair Law, we understand that family law cases involve more than legal filings and court dates. Paternity cases can affect your child, your finances, your parenting relationship, your family dynamics, and your long-term stability.
Our team helps clients review evidence and exhibits, organize timelines, evaluate and schedule genetic testing issues, understand voluntary acknowledgments, and prepare for hearings, settlement discussions, or parenting-plan negotiations. When helpful, we also identify other professionals who may support the non-legal aspects of the case, including counselors, therapists, financial planners, accountants, and other trusted resources.
We provide practical tools such as co-parenting communication templates, personal asset and property organization worksheets when relevant, and educational videos that help clients understand how to approach certain aspects of a family law matter with clarity and care.
Most importantly, we help clients slow down and understand what is being decided before they make decisions that may affect their child and family long-term.
Talk With a Manhattan Paternity Attorney
Whether you are trying to establish paternity, respond to a paternity action, challenge an acknowledgment, request genetic testing, seek child support, or create a parenting plan, you deserve clear legal guidance.
Addair Law helps clients in Manhattan and throughout Kansas (not including Johnson County) with paternity, child custody, parenting time, child support, and related family law matters. We approach these cases with compassion, preparation, and respect for what is at stake.
Call Addair Law at 785-645-2732 or contact us online to hire a Manhattan Kansas paternity lawyer.
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