To fill out New York Form 4-11, the Family Court Petition for Modification of an Order of Support, you identify the existing order you want changed, list the parties and children, state the facts showing why the order should be modified, specify the relief you want, and sign the verification in front of a notary or the Family Court clerk. The form itself runs only a few pages. The work is in gathering the right order details and financial documents before you start, and in filing and serving correctly once you finish.
Confirm You Have Grounds to File
Family Court will not modify a support order just because a party wants a different number. Under Family Court Act Article 4, you need one of three bases:1New York State Senate. New York Family Court Act Article 4 – Support Proceedings
- A substantial change in circumstances since the last order — job loss, a new disability, a significant raise, incarceration, or a child’s new medical needs.
- Three years or more have passed since the order was entered or last modified. Either party can ask for a fresh calculation on that basis alone.
- Either parent’s gross income has changed by 15 percent or more since the order.
You do not have to demand payment or anything else from the other party before filing. Family Court Act § 423 removes that requirement.2New York State Senate. New York Family Court Act FCT 423
Where to Get Form 4-11
The official petition is a free PDF on the New York State Unified Court System website in the Family Court forms section.3New York State Unified Court System. New York Form 4-11 Support Petition Paper copies are available at any Family Court clerk’s office.
If you would rather be guided through the questions, the court’s DIY Forms program includes a Support Modification and Enforcement/Violation Program. You answer prompts on screen and the program produces a completed petition ready to print and sign.4New York State Unified Court System. DIY Forms
Filling Out the Form
Use blue or black ink and print clearly if you are completing the form by hand. Clerks reject petitions with missing fields or illegible entries.
Existing Order Information
Near the top, identify the order you want to change. Enter the court that issued it (Supreme Court, Family Court, or another court), the date it was entered, and the docket or index number. If the order has been modified before, use the information from the most recent modification. All of this is on the face of the order itself, so pull it out before you start.
Petitioner, Respondent, and Children
List your full legal name and current address as petitioner. Then enter the respondent’s full name, home address, and place of employment. The work address matters later: the court may send an income withholding order directly to that employer.
For every child covered by the existing order, enter the child’s full name, current address, and date of birth in the designated fields.3New York State Unified Court System. New York Form 4-11 Support Petition In New York, parents are generally obligated to support a child until age 21, so include any child under that threshold.5NYC Human Resources Administration. Child Support Handbook
Federal law requires that social security numbers be collected for any person subject to a support order.6Office of the Law Revision Counsel. 42 USC 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement The court may ask for yours and the respondent’s during processing even if the form has no dedicated line, and refusing can result in sanctions.
Grounds for Modification
The statement of facts is where you explain why the order should change. Be specific. Instead of “I can’t afford the payments,” write what changed: “I was laid off from my position at [employer] on [date] and my gross income dropped from $X to $Y.” If you are asking for an increase, describe the change on the other side — a promotion, an inheritance, or new medical or educational expenses for the child.
If your only basis is that three years have passed or that income has shifted by 15 percent, say so plainly. You do not need to prove hardship when you rely on either of those grounds.
Requested Relief
Check the appropriate box and describe exactly what you want the court to do: increase the weekly amount, decrease it, add a health insurance obligation, or adjust arrears. The form asks you to specify the modification “as set forth above,” so your requested relief should connect directly to the facts you described. Vague requests like “adjust support to a fair amount” force the court to guess, which slows the case.
Prepare the Financial Disclosure
Alongside Form 4-11, prepare Financial Disclosure Affirmation Form 4-17a. Both parties are required to bring a completed form to the hearing. Gather the backup paperwork before your court date:7New York State Unified Court System. Financial Disclosure Affirmation Short Form
- Your two most recent pay stubs
- Your most recent federal and state tax returns
- W-2s and 1099 statements
- Proof of other income, debts, and loans
- Proof of health insurance coverage and its cost
- Proof of public assistance, if any
Form 4-17a is signed under penalty of perjury, so the numbers have to be accurate. Magistrates compare what you claim on the affirmation against the documents in your hand. Showing up without pay stubs or tax returns is one of the fastest ways to have the hearing adjourned, which restarts the wait.
Verify the Petition
The petition must be verified before filing. That means you swear the facts in it are true to the best of your knowledge. Sign the petitioner signature block in front of a notary public or the Family Court clerk, who can administer the oath. An unverified petition will be rejected at the window.
Where and How to File
File in the Family Court in the county where either you or the respondent lives. Family Court Act § 421 allows the proceeding to be brought in the county where either party resides at the time of filing.
There is generally no filing fee for support proceedings in Family Court. You have three ways to get the petition to the court:
- In person. Bring the completed, verified petition and all copies to the Family Court clerk’s window. If everything is in order, the clerk assigns a docket number on the spot.
- By mail. Send the original petition and copies to the Family Court in the appropriate county by regular or certified mail.
- Through EDDS. The Electronic Document Delivery System lets you upload PDFs and transmit them to courts that do not otherwise accept electronic filing. You enter basic case information, attach the petition as a PDF, and select the receiving court. EDDS delivers the file; the clerk still reviews and processes it on the other end.8New York State Unified Court System. Electronic Document Delivery System
Serving the Respondent
After the court accepts the petition and issues a summons, the respondent has to receive copies of both. Family Court Act § 427 allows several methods:
- Personal delivery. Someone other than you hands the summons and petition directly to the respondent at least eight days before the court date.
- Leave-and-mail. A copy is left with a person of suitable age at the respondent’s home or workplace, and another copy is mailed to the respondent’s last known address, at least eight days before the appearance date.
- Certified mail. The court may allow service by certified mail alone to the respondent’s last known address. If the respondent signs for the letter, service is complete.
- Substituted service. If personal service fails after reasonable effort, the court can order an alternative method under the Civil Practice Law and Rules.
No support order can be entered until the respondent has been properly served. If you cannot locate the respondent, tell the clerk. The court can sometimes help through its own resources, and otherwise you may need to hire a process server.
What Happens Next
Support petitions in New York are heard by support magistrates, who are court-appointed officials with authority to take evidence, calculate support, and issue orders in Family Court Act Article 4 cases. If a contested issue outside their power comes up, such as custody or an order of protection, the magistrate refers that piece to a judge.
Bring your completed Form 4-17a, all supporting financial documents, and any evidence that backs up the change in circumstances you described in the petition. The respondent is expected to bring the same financial paperwork. The magistrate reviews both sides’ income, applies the Child Support Standards Act formula under Family Court Act § 413,9New York State Senate. New York Family Court Act FCT 413 – Parents Duty to Support Child and decides whether a modification is warranted and in what amount.