Requirements to disestablish paternity and child support arrears

Short answer: In Florida, a male can disestablish paternity only by strictly meeting the requirements in Fla. Stat. § 742.18. If granted, the order stops future child support but does not erase already‑accrued arrears or allow a refund of support previously paid. Fla. Stat. § 742.18.[1][3]

Issue

What are the statutory requirements to disestablish paternity in Florida, and does a successful petition eliminate existing child support arrears?

Rule

• Statutory disestablishment is governed by Fla. Stat. § 742.18, which creates a cause of action to disestablish paternity/terminate a support obligation for a male who is not the biological father. Relief is limited to prospective support and does not create a claim to recover support previously paid. Fla. Stat. § 742.18.[1][3]
• Genetic testing can be compelled upon a proper sworn showing under Fla. Stat. § 742.12.[2][4]
• Separate and apart from § 742.18, paternity/support determinations embedded in final judgments may be challenged under Rule 1.540/Rule 12.540, subject to strict time limits for intrinsic fraud; misrepresentations of paternity in dissolution proceedings are intrinsic fraud requiring filing within one year. D.F. v. Dep’t of Revenue ex rel. L.F., 823 So. 2d 97 (Fla. 2002); Parker v. Parker, 950 So. 2d 388 (Fla. 2007); Dep’t of Revenue ex rel. Stephens v. Boswell, 915 So. 2d 717 (Fla. 5th DCA 2005); Dep’t of Revenue v. Myrick, 706 So. 2d 104 (Fla. 5th DCA 1998).[2][4]
• A verified motion under Rule 12.540 and Fla. Stat. § 742.10(4) based on recent DNA excluding the putative father can establish a material mistake of fact. State, Dep’t of Revenue v. Ductant, 957 So. 2d 658 (Fla. 3d DCA 2007).[2][4]
• The § 742.18 remedy is an independent statutory cause of action and may be used years after dissolution (but before the child turns 18). Johnston v. Johnston, 979 So. 2d 337 (Fla. 1st DCA 2008); Fla. Stat. § 742.18.[2][4][3]

Analysis

1) Statutory requirements to file and to obtain relief (Fla. Stat. § 742.18)

• Filing/venue/service:
  • File a petition in the circuit court with jurisdiction over the support order; if the obligation was set administratively and not ratified, file where the mother/guardian resides; serve the mother/guardian and, in administrative cases, the Department of Revenue. Fla. Stat. § 742.18.[1][3]
• Petition must include three affidavits/items:
  • Affidavit of newly discovered evidence relating to paternity that arose after the initial determination/establishment of support. Fla. Stat. § 742.18(1)(a).[1][3]
  • Recent genetic test results (administered within 90 days of filing) showing the male cannot be the father, or an affidavit that he lacked access to obtain testing and a request for court‑ordered testing. Fla. Stat. § 742.18(1)(b).[1][3]
  • Affidavit showing he is current or has substantially complied with support; any delinquency must have arisen from inability for just cause. Fla. Stat. § 742.18(1)(c).[1][3]
• Required findings for relief:
  • The court must find all of: (i) newly discovered evidence; (ii) properly conducted scientific testing; (iii) current or substantial compliance with any delinquency excused for just cause; (iv) no adoption; (v) not conceived by artificial insemination during wedlock; (vi) petitioner did not prevent the biological father from asserting rights; and (vii) child was under 18 when filed. Fla. Stat. § 742.18(2).[1][3]
• Statutory bars if, after learning he was not the biological father, the male: married the mother as reputed father and voluntarily assumed support; acknowledged paternity under oath; consented to be named on the birth certificate; promised in writing to support and was required to do so; ignored a written court/agency directive to test; or signed a voluntary acknowledgment under Fla. Stat. § 742.10(4). Fla. Stat. § 742.18(3).[1][3]
• While the petition is pending, the support obligation is not suspended absent good cause (the court may, in its discretion, hold payments in the registry). Fla. Stat. § 742.18(6).[1][3][4]

2) Does disestablishment eliminate arrears?

• No. If relief is granted, it is “limited to the issues of prospective child support payments” and related parental rights. The statute confirms all prior lawful actions taken in reliance on the prior paternity status and expressly disclaims any cause of action to recover child support previously paid. Fla. Stat. § 742.18(5).[1][3]
  • Practical effect: Arrears that accrued before the disestablishment order remain valid and collectible; the order stops only future support. Payments already made are not refundable. Fla. Stat. § 742.18(5).[1][3]

3) Related avenues and timing considerations

• Independent remedy and timing: § 742.18 created a stand‑alone statutory remedy that does not require pleading fraud and may be pursued even long after a dissolution judgment—so long as the child is under 18 at filing. Johnston v. Johnston, 979 So. 2d 337 (Fla. 1st DCA 2008); Fla. Stat. § 742.18.[2][4][3]
• Rule 1.540/12.540 relief: When the paternity determination arises from a final judgment (e.g., dissolution), challenges based on intrinsic fraud (such as misrepresentation of paternity) are subject to the one‑year limit. D.F. v. Dep’t of Revenue ex rel. L.F., 823 So. 2d 97 (Fla. 2002); Parker v. Parker, 950 So. 2d 388 (Fla. 2007); Dep’t of Revenue ex rel. Stephens v. Boswell, 915 So. 2d 717 (Fla. 5th DCA 2005); Dep’t of Revenue v. Myrick, 706 So. 2d 104 (Fla. 5th DCA 1998).[2][4]
• DNA testing access: If the petitioner lacks access to the child for testing, he may seek a court order for testing; genetic testing can be ordered on proper sworn allegations under Fla. Stat. § 742.12.[2][4]
• Acknowledgment challenges: A verified motion under Rule 12.540 and Fla. Stat. § 742.10(4) based on recent DNA excluding paternity may establish material mistake of fact. State, Dep’t of Revenue v. Ductant, 957 So. 2d 658 (Fla. 3d DCA 2007).[2][4]

Conclusion

To disestablish paternity under Florida law, a petitioner must strictly comply with Fla. Stat. § 742.18’s filing, proof, and non‑conduct requirements, including recent genetic exclusion or lack‑of‑access, substantial support compliance, and the child being under 18. If granted, the remedy terminates only future support; it does not wipe out pre‑existing arrears or permit a refund of support already paid. Fla. Stat. § 742.18(5)-(6).[1][3][4]

Practitioner checklist (summary)

• Verify child is under 18; screen for statutory bars post‑knowledge of non‑paternity. Fla. Stat. § 742.18(2)(g), (3).[1][3]
• Obtain accredited DNA test within 90 days of filing or plead lack of access and move for testing under Fla. Stat. § 742.12.[2][4]
• Prepare affidavits: newly discovered evidence; DNA/no‑access; current/substantial compliance with just‑cause explanation for any delinquency. Fla. Stat. § 742.18(1).[1][3]
• File in proper venue and serve the mother/guardian and, if applicable, the Department of Revenue. Fla. Stat. § 742.18(1).[1][3]
• Advise client: support continues during the case unless suspended for good cause; court may escrow payments. Arrears remain collectible; no refunds of prior payments. Fla. Stat. § 742.18(5)-(6).[1][3][4]