Established paternity in Florida is not always biologically correct. A man can sign a Voluntary Acknowledgment of Paternity at the hospital, be named the legal father by presumption of marriage, or be adjudicated the father by a court order, and later learn through DNA testing that the child is not his. Florida is one of a small group of states that wrote a dedicated procedure into statute for reopening those situations after the fact. That procedure is Florida Statute §742.18, titled "Disestablishment of paternity or termination of child support obligation."
Disestablishment is not the same thing as rescission. Rescission is the 60-day window under F.S. §742.10(4) that lets a man cancel a Voluntary Acknowledgment before it becomes final. Once that window closes, the acknowledgment has the legal weight of a paternity judgment and rescission is off the table. Disestablishment is the path that opens after finality. It is a civil petition filed in circuit court, and it asks a judge to legally undo a paternity finding that was correct on paper but wrong in the DNA. If you already have paternity established and you now have genetic evidence pointing another direction, this is the statute you are working with.
This guide walks through the five statutory requirements under F.S. §742.18(1)(a)-(e), the current-on-support rule at §742.18(2), what "newly discovered evidence" has meant in Florida case law, the mechanics of filing, and what disestablishment actually changes if granted. It is written for the man weighing whether to file, not as a substitute for a family law attorney.
The 5 statutory requirements under F.S. §742.18(1)
Section 742.18(1) lists five conditions a petitioner must plead and prove. The court cannot grant disestablishment unless every one of them is satisfied. The statute treats them as cumulative, not alternative.
(a) Newly discovered evidence relating to paternity
The petition has to allege newly discovered evidence relating to the paternity of the child that has come to the petitioner's knowledge since the initial paternity determination. The word "newly" is doing real work here. Evidence you had, or reasonably should have had, at the time the acknowledgment was signed or the paternity order was entered does not qualify. Rumors during the pregnancy, a hospital scene where the baby did not resemble you, or a mother's admission during an argument three years ago all sit poorly under this element if they predate the paternity determination and you did nothing then.
Courts want a specific, identifiable trigger dated after the paternity determination. In practice that trigger is almost always a genetic test result or a written admission from the mother, and it arrives at a specific point in time you can name in the petition. When you draft the petition, plead the date, the source, and the substance of the new evidence with enough detail that a judge reading the four corners of the document can see the trigger clearly. Vague pleading on this element invites early dismissal.
(b) A scientifically reliable genetic test
Element (b) requires either a scientifically reliable genetic test administered within the 90 days immediately preceding the filing of the petition, or a request in the petition that the court order such a test. The statute defines the test as one that shows a 99 percent or higher probability of paternity for inclusion, or a zero percent probability for exclusion.
The 90-day window is strict. If your legal DNA test was done ten months ago, it will not satisfy this element on its own. You either need a fresh test or you need to ask the court to order one as part of the petition. The court-ordered path is common when the mother has custody and will not cooperate with private testing. When the court orders the test, it will designate an approved collection facility and the parties will present with photo ID for chain-of-custody sampling. The result comes back to the court and to counsel, not to the parties directly.
"Scientifically reliable" in this section has been read to mean the standard genetic testing methodology used in family courts, typically autosomal short tandem repeat analysis on 20 or more markers with statistical calculation of the paternity index. If you are commissioning a legal test before filing, confirm the lab provides a report with the paternity index calculation and the underlying marker data, not just a bottom-line conclusion.
(c) The petitioner has never adopted the child
If you adopted the child, disestablishment is closed to you. Adoption creates a legal parent-child relationship independent of biology, and the legislature drew a hard line here. This element also blocks stepparent adoptions where the man later regrets the decision. Once the adoption is final, §742.18 is not the remedy.
(d) The child was not conceived by artificial insemination during marriage
If the petitioner and the mother were married at the time of conception, and the child was conceived by artificial insemination performed with the petitioner's consent, disestablishment is not available. Florida treats consented-to donor conception during marriage as a completed legal decision. The consent, not the biology, is what creates fatherhood in that circumstance.
(e) The petitioner did not prevent the biological father from asserting paternity
The last element blocks men who kept the biological father in the dark or actively pushed him out of the picture so they could stand in as father themselves. If you knew who the biological father was, and you took steps that stopped him from asserting his rights, the statute takes that as a waiver of your right to disestablish later. This element is fact-driven and gets litigated when the mother contests the petition.
What "newly discovered" actually means
Florida appellate courts have narrowed the meaning of newly discovered evidence in disestablishment cases in a way that surprises many petitioners. Suspicion is not evidence. A hunch during the marriage, a comment from a relative, or general marital problems do not count as knowledge for statutory purposes. Courts want something concrete: a genetic test, a written or recorded admission, or a paternity finding in another case involving the same child.
The mirror image also matters. If you had concrete evidence at the time of the original paternity determination and did not act on it, calling it "newly discovered" years later is a losing argument. Florida courts have denied petitions where the man testified at trial that he had "always had doubts" but signed the acknowledgment anyway. Doubts, without more, are not the trigger. The clock for element (a) starts when you first had knowledge that would have caused a reasonable person to question paternity, not when you finally acted on that knowledge.
Diligence after the trigger also matters. A man who receives a DNA result showing exclusion and then waits two years to file gives the court and the opposing party room to argue that the evidence is no longer "newly" discovered in any meaningful sense. Practically, if you have a result in hand, the petition should follow within a reasonable time, and the 90-day rule in element (b) will force that timing anyway.
The current-on-child-support requirement
Section 742.18(2) adds a second layer that trips up many petitions. The petitioner must be current on all child support payments, or must have substantially complied with the support order, or must show that any failure to pay was based on just cause and not on a willful disregard of the obligation. The court will look at the payment history at the Florida Department of Revenue Child Support Program before ruling.
If you are behind on support and cannot show a good-faith reason, the court can deny the petition on this ground alone even if all five elements under §742.18(1) are otherwise met. "Just cause" has been read to include job loss, serious illness, and periods of documented incapacity. It has not been read to include a decision to stop paying because you believed the child was not yours. The statute treats withholding support as a self-help remedy that undermines your case rather than supports it. If you have arrears and you file, you need a documented explanation ready.
You can check your current support balance and payment history through the Florida child support case information portal before filing. Bring the printout with the petition.
Filing procedure
The petition is a civil filing in circuit court. Venue is the circuit court where the support order was issued if there is one, or the circuit where the child resides if the paternity was established without a support order. You will be filing under the family law division and using the paternity case type.
Florida has self-help forms for many family law matters, but there is not a fill-in-the-blank disestablishment petition on the state forms site the way there is for divorce. Most petitions are drafted by counsel or built from local court self-help resources. The Florida Courts family law self-help page is the starting point for form availability and county-level guidance. The full text of the statute is on the Florida Legislature statutes site and should be attached or cited in the petition.
The petition must be verified, which means you sign it under penalty of perjury. It must plead each of the five elements under §742.18(1) with supporting facts and must plead the current-on-support element under §742.18(2). Attach the genetic test result if you have one that meets the 90-day rule. If you are asking the court to order the test, plead that request in the petition and explain why private testing is not possible.
Notice goes to the mother and to any other party with a legal interest in the paternity finding, which can include the state if support has been paid through the Florida Department of Revenue. The Department is often served as a party because a disestablishment order affects the state's collection rights. If you cannot afford the filing fee, ask the clerk about the Application for Determination of Civil Indigent Status; a fee waiver is available for petitioners who qualify.
After service, the court will typically set the matter for hearing. If element (b) requires a court-ordered test, that order will come early and the case will pause while the test is completed. If the mother contests any of the five elements, expect an evidentiary hearing.
What happens after the court grants disestablishment
An order granting disestablishment ends the future child support obligation on the date the order is entered. The order does not create a refund of past support payments. Section 742.18(3) is explicit on this: relief is prospective. Money already paid to the mother or the state stays where it is, and arrears that accrued before the order remain owed unless the court exercises specific authority to modify them.
The order terminates the legal parent-child relationship for support purposes. It also removes the petitioner from the birth certificate through the process at the Florida Bureau of Vital Statistics, which handles amendment based on a certified court order.
Inheritance and custody rights end with the legal relationship. The now-former legal father no longer has a right to custody or visitation, and the child no longer inherits from him under Florida intestate succession. If the two of you had built a bond over years, the court has no mechanism under §742.18 to preserve visitation. That result surprises some petitioners and is worth thinking through before filing.
The order does not identify or establish a new legal father. It removes one man from the record. Establishing the biological father is a separate proceeding, brought by the mother, the biological father, or the Department of Revenue.
Where at-home DNA testing fits
The statute requires either a scientifically reliable genetic test administered within 90 days of filing, or a request that the court order one. That test has to be a legal chain-of-custody test to be admissible. A home paternity test kit is not court-admissible in Florida disestablishment proceedings. Samples collected at home, by the parties themselves, cannot satisfy the evidentiary standard the court applies.
Where the home test fits is upstream of the petition. Before you spend money on filing fees, a legal test, and possibly counsel, you may want to confirm privately what you suspect. A home paternity test kit from USDC runs $79 and analyzes up to 28 genetic markers with cheek-swab samples. Order-to-results turnaround is 7 to 10 business days on standard processing. The result is informational, not legal, and cannot be filed with the court, but it will tell you privately whether the DNA supports going further.
If the home result confirms exclusion and you decide to file, you will need a legal test with chain of custody for the petition. USDC's legal paternity test product page is currently marked Coming Soon. Until it launches, legal testing needs to be arranged through a provider that offers documented collection.
Two other USDC options are worth mentioning for adjacent situations. If the mother will not cooperate and you cannot get a sample from the child, a grandparent DNA test at $139 or an aunt-uncle DNA test at $139 can give you a probability figure using biological relatives on your side of the family. Again, informational only, not filed with the petition, but useful for private clarity.
Common denials and how they happen
Reading appellate opinions on §742.18 shows a few recurring patterns in denied petitions.
The first is the rescission-window trap. A man signs a Voluntary Acknowledgment at the hospital with real doubts, does not rescind within 60 days under F.S. §742.10(4), and years later files under §742.18 arguing newly discovered evidence. Courts have denied these when the record shows the man knew enough at signing to have acted then. The rescission window is not a formality. Missing it and then using disestablishment as a second chance is not what the statute is for.
The second is delay. Element (a) uses "newly discovered." A petition filed within weeks of a DNA result reads as newly discovered. A petition filed 18 months after the result does not. Delay also feeds into laches arguments from the mother's counsel.
The third is failure to name a proper respondent or to serve required parties. If the Department of Revenue has been enforcing support, it typically must be served. Skipping that service can leave the order vulnerable on appeal even if the merits favored the petitioner.
The fourth is the current-on-support failure. Arrears without a documented just cause defeat the petition. Courts read §742.18(2) strictly.
FAQ
Can I file disestablishment if I signed a Voluntary Acknowledgment years ago?
Yes, if you meet all five elements under §742.18(1) and the current-on-support rule under §742.18(2). A signed acknowledgment that has passed the 60-day rescission window is treated as an established paternity determination, and §742.18 is the path to unwind it. The passage of time does not close the door on its own, though a long delay after the "newly discovered" trigger can hurt the petition.
Will I get back child support I already paid?
No. Section 742.18(3) makes the relief prospective. Payments already made to the mother or through the Department of Revenue are not refunded. Arrears that accrued before the order generally remain owed.
Do I need an attorney or can I file pro se?
You can file pro se, and some petitioners do. The petition must plead each statutory element with supporting facts and must survive the mother's contest if she opposes. If the case is contested or the Department of Revenue is involved, most petitioners hire family law counsel. Florida's Florida Bar Lawyer Referral Service is one place to start.
What if I lose visitation with the child? Can the court preserve it?
Section 742.18 does not give the court authority to keep visitation in place after disestablishment. The legal relationship ends, and with it the right to custody or visitation. Some petitioners weigh that outcome and decide not to file even when the biology would support it. It is a decision worth thinking through in advance.
Does a home DNA test result satisfy the statute?
No. Element (b) requires a scientifically reliable test that will be admissible in court. That means chain-of-custody collection by a qualified third party, not samples taken at your kitchen table. A home test is useful for private confirmation before you file, but the court will require a legal test, either one you obtained within the 90-day window or one ordered by the court after the petition is filed.
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