Contesting paternity is not "proving the child isn't yours." It is a lawsuit to remove your name as the father from the child's civil status record (birth record), and it is won not by emotion but by two things: a properly ordered court-appointed genetic examination, and meeting the filing deadline. The costliest mistake I see again and again is arriving in court with a home DNA test from a private lab and treating the matter as settled. Below is how this type of case works, what happens to child support, and three of my cases where the paternity record was removed.
In brief: 6 points
- Contesting paternity is a separate claim under Article 136 of the Family Code of Ukraine, not to be confused with acknowledging or establishing paternity.
- Paternity can be contested only before the child turns eighteen. After that the right is lost.
- A person who knew at the time of registration that he was not the father has no right to contest paternity — the law says so directly.
- A private DNA test by itself does not decide the case. A court-appointed forensic genetic examination with an official sample collection is required.
- Child support already paid is generally not refunded, but any arrears accrued while you were listed as the father are written off.
- In three of my cases the courts removed the paternity record, and in one of them also cancelled a court order for child support collection.
Three different claims that people keep confusing
Before drafting a claim, you need to answer one question: are you removing an existing record naming you, proving your own paternity, or confirming the paternity of a deceased man. These are three different articles of the law, three different procedures, and three different sets of parties.
| Feature | Contesting paternity | Acknowledging paternity | Establishing the fact of paternity |
|---|---|---|---|
| Legal basis | Article 136 of the Family Code of Ukraine | Articles 128, 129 of the Family Code of Ukraine | Article 130 of the Family Code of Ukraine |
| Purpose | Remove the record naming oneself as father | Recognize a living man as the father | Confirm the paternity of a deceased man |
| Who applies | The person recorded as the father | The mother, a guardian, the child after reaching adulthood, or a man who believes he is the father | The mother, a guardian, a person supporting the child, the child after reaching adulthood |
| Proceedings | Litigation (adversarial claim) | Litigation (adversarial claim) | Special (non-contentious) proceedings |
| Form of application | Statement of claim | Statement of claim | Application |
If you are not looking to contest paternity but need the opposite — confirming the paternity of a man who has already died — there is a separate article on that: establishing the fact of paternity after the father's death.
Who has the right to contest paternity
The right to contest one's own paternity belongs to the person recorded as the child's father — exercised by filing a claim to remove information about him as the father from the birth record. If the court finds there is no biological relationship, it issues a judgment removing that information.
Paternity may also be contested by the child's mother regarding the record naming a man as father, and, where grounds exist, by the child once they reach adulthood. In practice, however, the most common case is a claim filed by the man who was recorded as the father.
Who cannot contest paternity
This is the section worth reading before paying for an examination.
- A person who knew at the time of registration that he was not the child's father. The law directly denies such a person the right to contest paternity. The reasoning is straightforward: he knowingly took on fatherhood, and he cannot reverse that decision because of a quarrel or a divorce.
- A person who consented to the use of assisted reproductive technologies.
- A person who applies after the child has reached adulthood. Contesting is possible only after the child's birth and before the child turns eighteen.
- If the child has died, contesting paternity is not allowed.
In practice this means the defendant's objection — "he knew all along, even at the maternity hospital" — is not just rhetoric; it is an attempt to strike out the basis of the claim entirely. That is why the circumstances of the registration need to be worked through in advance: when doubts first arose, what exactly the person knew at the time, and what evidence supports that.
The main mistake: a private DNA test
People arrive with a lab result for which samples were collected on their own, and assume the case is settled. The problem is not the quality of the testing but the procedural side: no one can confirm whose samples were actually tested. The court treats such a document as ordinary written evidence, which the opposing side can easily challenge.
The working approach is different: a private test is used as grounds for a motion, while the court itself orders a forensic molecular-genetic examination, in which sample collection is carried out officially, with the identity of every participant recorded. It is that expert opinion that becomes the evidence on which the judgment is built.
The cost of the examination is usually borne initially by the party that filed the motion, and then allocated between the parties based on the outcome. In my cases, the court costs were awarded in the client's favor.
If the other side avoids the examination
A classic tactic: the mother does not show up for sample collection, does not bring the child, and keeps rescheduling. The calculation is simple — no examination, no evidence.
Procedural law accounts for this tactic. If a party evades participation in the examination, or fails to provide the experts with the necessary materials or objects of study without good cause, the court may deem the fact that the examination was meant to clarify as established or disproved. In other words, evasion tends to harm the party that evades.
The only requirement is to document it properly: the motion, the court's ruling ordering the examination, evidence of proper notice, and the expert institution's records of the no-show.
Three of my cases
These are cases I personally handled. The texts of the judgments are public; links to the Unified State Register of Court Decisions are given in the table.
| Case | Client's situation | What was done | Outcome |
|---|---|---|---|
| No. 643/16538/20 (judgment text) | The client was recorded as the father at the child's birth; doubts arose later, and an out-of-court DNA examination ruled out a match | A forensic genetic examination was arranged, medical evidence and witnesses were gathered, and a claim to remove the record was prepared | The claim was granted based on the examination: the paternity record was removed, and court costs were awarded to the plaintiff |
| No. 619/3558/19 (judgment text) | The client was recorded as the father of two children; private DNA testing showed no match, while child support was being collected in parallel | A claim was prepared with the DNA results and motions for a forensic examination; a court order for child support collection was separately appealed | The court removed the paternity record and cancelled the child support order; part of the amounts paid and the court fee were partially reimbursed |
| No. 754/11022/24 (judgment text) | The plaintiff claimed he was not the biological father; the case required a molecular-genetic examination | A comprehensive molecular-genetic examination was initiated, official sample collection was arranged, and a motion was filed | Paternity was excluded; the court fee was recovered from the defendant |
What these cases show in practice. First, in all three, the key piece of evidence was the court-ordered examination, while private testing played only a supporting role — giving grounds to file the motion. Second, the second case shows that contesting paternity and the child support issue should be handled in parallel: otherwise enforcement proceedings keep running while the main dispute is still ongoing.
These are results of specific cases with specific evidence. The outcome of one case does not automatically carry over to another: if the examination confirms biological relationship, the court will dismiss the claim, and the costs of the proceedings will remain yours.
What happens to child support
This is the question people come to me about most often. Here you need to clearly separate three different things.
| What exactly | What happens after the record is removed |
|---|---|
| Future payments | The basis for collection disappears: the duty to support the child ends |
| Arrears from the past period | Removing the paternity record is grounds for releasing the person from paying arrears that accrued during the period when he was recorded as the father |
| Amounts already paid | As a rule, not refunded: child support obtained without legal grounds is not subject to return if it was paid voluntarily, without a calculation error by the payer and without bad faith on the part of the recipient (Article 1215 of the Civil Code of Ukraine) |
I will say this plainly, because it affects the decision to go to court: you should not count on getting back all the child support paid over the years. The main point of contesting paternity is to stop future payments and clear the arrears, not to recover the past. In one of my cases part of the amounts paid was recovered, but that was the result of specific circumstances, not a general rule.
Documents: what to get, where, and why
| Document | Where to obtain it | Why it is needed |
|---|---|---|
| Child's birth certificate | You already have it; the civil registry office (DRACS) | Shows the existing record naming the father |
| Extract from the civil registry (DRACS) on the birth | Civil registry office (DRACS) | Confirms the grounds on which the father's record was entered |
| Marriage certificate or divorce certificate | Civil registry office (DRACS) | Affects the presumption of paternity |
| Results of a private DNA test | Laboratory | Grounds for a motion for a court-ordered examination |
| Medical records | Medical facility | Supporting evidence about the circumstances of conception and birth |
| Child support collection documents | Court, enforcement service | Needed to resolve the child support question in parallel |
| Information on the defendant's place of residence | Registers, attorney inquiry | Needed for proper notice and summons |
Step-by-step
- Check the deadline: the child must not have reached adulthood at the time you file.
- Assess the risk of the objection that you knew there was no biological relationship at the time of registration.
- Order an extract from the civil registry (DRACS) and check on what basis the father's record was entered.
- Get a private DNA test done — it is needed not as evidence, but as grounds for the motion.
- File the claim to remove the father's information from the birth record.
- File a motion for a court-ordered forensic molecular-genetic examination with official sample collection.
- Handle the child support issue in parallel: the court order, enforcement proceedings, arrears.
- After the judgment, apply to the civil registry office (DRACS) to have the birth record amended.
Mistakes that cost people their case
- Coming to court with only a private test. Without a court-ordered examination it carries little weight.
- Waiting until the child turns eighteen. The right to contest disappears for good.
- Not dealing with child support in parallel. Enforcement proceedings keep running while the dispute is ongoing.
- Expecting to get back all the child support paid. That is the exception, not the rule.
- Ignoring the circumstances of the registration. The objection "you knew" can destroy the claim entirely.
- Not finalizing the judgment at the civil registry (DRACS). Until the birth record is amended, you formally remain the father.
Frequently asked questions
Is a DNA test from a private lab enough?
As a rule, no. The problem is not the quality of the testing but the fact that no one can confirm whose samples were actually tested: you collected them yourself, with no procedural verification of identity. The court treats such a document as ordinary written evidence, and the opposing side can easily challenge it. The working approach is different: a private test is used as grounds for a motion, and the court orders a forensic molecular-genetic examination, during which sample collection is carried out officially, with the identity of every participant confirmed. It is that expert opinion that becomes the evidence on which the judgment is built. In all three cases I handled, the key evidence was the court-ordered examination, while private results played only a supporting role. So a private test is best treated as a tool for making your own decision — whether to go to court or not — rather than as ready-made evidence for the proceedings. The money spent on it is not wasted: without a preliminary result, filing a motion for a court-ordered examination is usually premature.
Up to what age of the child can paternity be contested?
Contesting is possible only after the child's birth and before the child turns eighteen. After the age of eighteen, the right to contest the record is lost, and no good reasons for missing it will help — this is not a procedural deadline that can be reinstated, but a limit on the right itself. Separately, the law provides that contesting paternity is not allowed if the child has died. The practical takeaway is simple: once doubts have arisen, there is no room to wait, and the decision to hold off "until the child is older," to avoid causing distress, is emotionally understandable but legally fatal. The closer you get to the child's eighteenth birthday, the less time remains for the examination, the hearing, and any possible appeal. In practice, ordering and conducting the forensic examination alone adds several months to the proceedings, and that should be factored into your planning well in advance. If the child is already sixteen or seventeen, delay can mean the case simply will not be heard in time.
What if the mother avoids the examination?
This is a common tactic: failing to show up for sample collection, rescheduling dates, refusing to bring the child. The calculation is that without an examination there will be no evidence. Procedural law accounts for this kind of behavior: if a party evades participation in the examination, or fails to provide the experts with the necessary materials or objects of study without good cause, the court may deem the fact that the examination was meant to clarify as established or disproved. In other words, evasion works against the party that evades. But this does not happen automatically: you need to properly document the chain of events — the motion, the court's ruling ordering the examination, evidence that the party was duly notified, and the expert institution's records of the no-show. Without these documents, the court has no basis to apply this rule. That is why every no-show should be documented immediately, rather than hoping the court will assess the party's conduct on its own at the end of the proceedings. In parallel, it is worth asking the court to set a new date for sample collection: this removes the argument that the party had no real opportunity to appear.
Will I get back the child support I paid for years?
Mostly no, and it is better to know that upfront. Child support obtained without legal grounds is not subject to return if it was paid voluntarily, without a calculation error by the payer and without bad faith on the part of the recipient — this is set out in Article 1215 of the Civil Code of Ukraine. The same applies to amounts collected through enforcement proceedings under a court judgment that has entered into legal force. At the same time, removing the paternity record is grounds for releasing you from arrears that accrued during the period when you were recorded as the father, and it stops future payments. In one of my cases part of the amounts paid was recovered, but that was the result of the specific circumstances of that case, not a general rule you should count on. So I advise calculating the financial sense of the case based on future payments and the arrears that get written off, not on the past. If the child has only a year or two left until adulthood and there are no arrears, the benefit may end up smaller than the cost of the examination and the proceedings.
Can I contest paternity if I knew the child was not mine?
No. The law directly denies the right to contest paternity to a person who, at the time he registered himself as the child's father, knew he was not the father. The logic is this: the person knowingly took on fatherhood, and cannot revisit that years later, after a quarrel or a divorce. In practice this means the defendant's objection — "he knew all along" — is not an emotional argument but an attempt to strike out the legal basis of the claim. That is why the circumstances of the registration are worked through in advance: exactly when doubts arose, what supports them, and what the relationship was like at the time of registration. If the case file contains correspondence or other evidence of awareness, the prospects of the case need to be assessed very carefully. This is a situation where an honest assessment at the outset saves both time and the money that would otherwise go toward an examination that will not change anything. That is why at the first consultation I always ask not only about the doubts, but also about the circumstances under which the father's record was entered.
What to do after the court judgment?
The court judgment by itself does not change the birth record. Once it enters into legal force, you need to apply to the civil status registration office (DRACS) to have the child's birth record amended — that is when the information naming you as the father is actually removed. In parallel, child-support-related matters are closed out: cancelling the court order or judgment for collection, closing the enforcement proceedings, and being released from arrears. If this is not done, you formally remain recorded as the father, and the enforcement service will keep collecting under documents that have not yet been cancelled. So finalizing matters after the judgment is not a formality — it is a separate stage of work that should be planned for in advance. In practice this means several visits: to the civil registry office (DRACS) for the change to the birth record, and to the court or the enforcement officer regarding child support and the enforcement proceedings. Until these steps are completed, collection may continue under documents that formally have not gone away.
Do you have doubts about your paternity, or have you already been served with a child support claim? Send me the child's birth certificate, any child support collection documents, and the results of a private DNA test if you have one. I will tell you whether the deadline still allows filing a claim, what objections the other side is likely to raise, and what to do about child support while the dispute is ongoing. Terms of work and prices are on the contesting paternity page, and child support matters are handled together with child support collection. Consultations are held in Ukrainian or Russian; written communication in English is available.