12.905(a): Supplemental Petition to Modify Parenting Plan and Time-Sharing
Rewrite the plan, know why - name what changed, then prove it with dated facts.
12.905(a) is Florida's Supreme Court approved supplemental petition to modify parental responsibility, visitation, or an existing parenting plan / time-sharing order. You use it in an existing case when you need new court-ordered terms - not to draft a first plan from scratch. That plan-design lane is generally 12.995. Sort whether your story is an outdated plan or a broken order before you file.
Official sources
- 12.905(a) form page (Florida Courts): https://www.flcourts.gov/Services/Family-Courts/domestic-relations-court-resources/family-law-forms/Supplemental-Modification-Petitions-12.905-Forms-A-C/Supplemental-Petition-to-Modify-Parental-Responsibility-Visitation-or-Parenting-Plan-Time-Sharing-Schedule-and-Other-Relief
- 12.905(a) PDF (Rev. 11/15): https://www.flcourts.gov/content/download/685834/file_pdf/905a.pdf
- 12.905 family hub (Forms A-C): https://www.flcourts.gov/Services/Family-Courts/domestic-relations-court-resources/family-law-forms/Supplemental-Modification-Petitions-12.905-Forms-A-C
- Florida Family Law Forms index: https://www.flcourts.gov/Resources-Services/Court-Improvement/Family-Courts/Family-Law-Forms
When to use 12.905(a)
Florida form instructions state you use 12.905(a) when asking the court to change the current parental responsibility, visitation, and/or parenting plan/time-sharing schedule after a final judgment or prior modification. You must explain a substantial, material, and unanticipated change in circumstances and why the modification is in the child's best interests. File in the circuit court county where the original order was entered, sign before a notary or deputy clerk, and serve the other party per court rules. Circuit e-filing requirements, mediation, and intake steps may vary - confirm locally with official court resources or counsel you hire.
| Outdated plan | Broken order |
|---|---|
| Move, school zone change, commute math, care collapse | Specific weekend text keeps getting ignored with dated proof |
| You need new paragraphs for a new real-life week | You need compliance pressure or clarity on existing lines |
Sort before the clerk
- Quote the plan sections you say failed.
- List change facts with neutral anchors.
- Draft replacement timesharing language a reader could enforce.
- Confirm circuit supplemental form variant and service.
12.905(a) (this form)
Supplemental petition to modify parental responsibility, visitation, or parenting plan/time-sharing in an existing case.
Not the same as
- 12.905(b) - Supplemental Petition for Modification of Child Support
- 12.905(c) - Supplemental Petition for Modification of Alimony
- 12.995 - Parenting plan document (substance), not the modification petition
Organize your parenting plan modification facts and evidence
MyCustodyCoach can help you organize dates, schedule problems, messages, and supporting documents in one place before you complete 12.905(a) or speak with counsel. MCC does not file forms for you and is not a substitute for a lawyer.
Related guides
More Florida forms
State guides (overview)
General support (not Florida-specific)
12.905(a) questions
What is Florida form 12.905(a)?
Form 12.905(a) is Florida's Supreme Court approved Supplemental Petition to Modify Parental Responsibility, Visitation, or Parenting Plan/Time-Sharing Schedule and Other Relief. You use it to ask the circuit court to change an existing final judgment or prior modification regarding parental responsibility, visitation, or a parenting plan/time-sharing schedule. It is a modification petition, not a first-time parenting plan form.
Where can I download the official 12.905(a) PDF?
Florida Courts publishes 12.905(a) on flcourts.gov. The official form page is under Supplemental Modification Petitions (12.905 Forms A-C), and the English PDF is at flcourts.gov/content/download/685834/file_pdf/905a.pdf (Rev. 11/15). Use the official Judicial Branch links on this page rather than third-party copies.
When should I use 12.905(a) to modify a parenting plan?
Florida form instructions state you use 12.905(a) when asking the court to change the current parental responsibility, visitation, and/or parenting plan/time-sharing schedule in an existing case. The form requires you to explain a substantial, material, and unanticipated change in circumstances since the final judgment or last modification, and why the modification is in the child's best interests. Whether your facts meet that standard is for the court to decide - confirm with official resources or counsel you hire.
Is 12.905(a) filed and served?
Yes. Florida form instructions state you sign before a notary public or deputy clerk, file the original with the clerk of the circuit court in the county where the original order was entered, and properly notify the other party. Personal service is preferred when you know where the other party lives; if personal service is used, the other party generally has 20 days to answer. E-filing rules and circuit intake steps may vary - check with your clerk or family law intake staff.
How is 12.905(a) different from form 12.995?
12.995(a) and 12.995(b) are Florida parenting plan forms where you spell out timesharing, decision-making, and logistics. 12.905(a) is the supplemental modification petition where you ask the court to change an existing order or plan. A modification case may include a proposed or agreed 12.995 parenting plan, but the procedural lane is different from drafting a first plan on 12.995 alone.
What forms may be filed with 12.905(a)?
Florida 12.905(a) instructions list forms that may accompany the petition depending on your request: Uniform Child Custody Jurisdiction and Enforcement Act Affidavit (12.902(d)), Parenting Plan (12.995(a) or 12.995(b)), and conditionally Financial Affidavit (12.902(b) or 12.902(c)), Child Support Guidelines Worksheet (12.902(e)), and Notice of Social Security Number (12.902(j)). Form 12.905(b) is for child support modification and 12.905(c) is for alimony modification - not substitutes for 12.905(a). Not every modification requires every listed form.
Last reviewed: 2026-06-03
MyCustodyCoach is not a law firm. Court rules, fees, and form versions change by county; confirm what applies to your case with official court resources or counsel you hire.