Florida Supreme Court Approved Family Law Form 12.905(b), Supplemental Petition for Modification of Child Support

Start with the free official Form 12.905(b)

Florida Courts currently lists Florida Supreme Court Approved Family Law Form 12.905(b), Supplemental Petition for Modification of Child Support, revised November 2015. The official PDF contains seven pages: four instruction pages followed by the three-page petition.

Source checked October 1, 2026. The current Florida Courts download matched the reviewed source file exactly. Always confirm the revision before relying on a saved copy.

What the official packet says the petition addresses

The packet describes the form as a request to change a current court-ordered child-support obligation. It says a court can change an order or judgment if the judge finds a substantial change in the parties' circumstances and that the change is in the children's best interests.

What information appears on Form 12.905(b)?

1. Match the existing case caption

The petition begins with the judicial circuit, county, case number, division, petitioner, and respondent. It also asks for the full legal name of the person making the petition.

Use the existing court record to identify factual caption information. This guide does not decide party labels, venue, jurisdiction, or where a petition should be filed.

2. Identify the existing judgment without characterizing it

Paragraph 1 displays four judgment-type choices: dissolution of marriage, paternity, support unconnected with dissolution of marriage, and “Other,” with a description line. It also asks for the judgment date and states that a copy of the final judgment and any modifications is attached.

Paragraph 2 asks for the paragraph numbers establishing present support, whether that source is the final judgment or the most recent modification, the current amount, the payment frequency, and the beginning date.

These fields record what the existing documents say. This guide does not classify a court order, identify the controlling provision, or resolve conflicts among orders.

3. Treat the three narrative sections as legal-content boundaries

The petition contains separate spaces for: the claimed substantial change in circumstances, the requested child-support modification, and why the requested change is asserted to be in the children's best interests.

4. Keep financial records separate from legal conclusions

The instruction packet discusses financial affidavits and the Child Support Guidelines Worksheet. The petition itself asks whether a completed Family Law Financial Affidavit “is” or “will be” filed and whether a Child Support Guidelines Worksheet “is” or “will be” filed.

Those choices describe filing status. They do not calculate support, establish the accuracy of financial information, select the short or long affidavit, or determine what documents a particular case requires.

5. Do not place Social Security numbers in this petition

Paragraph 7 refers to a separate Notice of Social Security Number, Form 12.902(j), if it was not previously filed. Form 12.905(b) does not display a blank for a Social Security number.

This public guide does not request or collect Social Security numbers. Review the official confidential-information instructions and current court procedures before handling protected identifiers.

6. Review the oath, signature, and notarization block separately

The final page contains an oath concerning the truthfulness of the petition, a warning about knowingly making a false statement, the petitioner's date and signature, contact information, designated email addresses, and a notary-public or deputy-clerk block.

Completing a PDF does not sign it, administer an oath, notarize it, file it, serve it, or turn it into a court order. Read the official execution language before signing and obtain qualified help if its consequences are unclear.

7. Read the 2015 procedural instructions in current context

The packet discusses filing location, e-filing, service, response timing, default, uncontested and contested paths, mandatory disclosure, hearings, mediation, and several related forms. Those instructions describe the official packet, but procedures and local requirements can change.

Florida Courts' current self-help guidance ↗ says self-represented parties are responsible for current statewide rules, local rules, administrative orders, required documents, and deadlines. Court self-help personnel may provide permitted administrative and procedural information, but they do not act as a filer's lawyer.

Nonlawyer assistance has a separate disclosure block

The packet says a nonlawyer who helps complete the form must provide Form 12.900(a), Disclosure from Nonlawyer, before helping and must place identifying information at the bottom of the last page. Form 12.905(b) includes those blanks below the notarization section.

Sun State does not decide what legal claim a customer should make, select facts or legal theories, recommend relief, or advise how the law applies to a customer's circumstances.

Common factual questions

Official information and independent help

Prepared by Sun State Legal Forms. Published and substantively reviewed October 1, 2026 using the complete official Florida Courts packet and current official form listing. Read our content and source-review standards.