Child Support Modification - Wyoming
PETITION FOR MODIFICATION OF CHILD SUPPORT
Before you use this: The Wyoming Judicial Branch publishes a current CSMP 04 Petition for Modification of Child Support and Judgment for Arrears and CSMP 02 filing instructions. Use those forms for the court's requested format and required accompanying papers. This fillable petition states the requested relief and supporting facts; it changes no existing obligation until the Court enters a new order.
IN THE DISTRICT COURT OF THE STATE OF WYOMING
[____________________] JUDICIAL DISTRICT, [____________________] COUNTY
Petitioner: [________________________________]
Respondent: [________________________________]
Case No. from existing support order: [____________________]
Petitioner requests modification of the existing child-support order under Wyo. Stat. § 20-2-311 and states:
1. Parties, order, and court authority
- Petitioner is ☐ the parent currently receiving support ☐ the parent currently paying support ☐ other authorized party: [____________________]. Petitioner resides in [____________________] County, [State]. Respondent resides in [____________________] County, [State].
- The original support order was entered on [__/__/____] by [____________________] Court, [____________________] County, [State], case number [____________________]. ☐ It has never been modified. ☐ Its most recent modification was entered on [__/__/____] by [____________________] Court, [____________________] County, [State]. Attach a copy of the current order.
- This Court may modify the order because: [Describe the Wyoming connection, prior order, and any registration of an out-of-state order: ________________________________________________________________]. Petitioner asks the Court to determine its authority to modify before entering relief.
- The children covered by the current order are identified by initials and birth years: [________________________________________________]. Their current residence and relevant residence history are: [________________________________________________]. Add a separate confidential filing if the court requires full identifying details.
2. Current obligation and proposed calculation
- The current order requires [____________________] to pay $[________] per month, beginning [__/__/____]. The order's current medical-insurance and uncovered-expense terms are: [____________________________________________________________].
- The most recent available monthly net incomes are approximately $[________] for Petitioner and $[________] for Respondent. The presumptive amount calculated under the current Wyo. Stat. § 20-2-304 tables is $[________] per month, payable by [____________________]. The proposed amount is $[________] per month. Attach the completed court-approved financial affidavit and computation form at the stage required by the CSMP instructions; the Court must have the statutory financial evidence before it enters a modified support order under § 20-2-308(a).
- The monthly change between the existing order and the new presumptive amount is $[________], or [____]% of the existing monthly obligation. Explain the calculation and any applicable shared or split custody adjustment: [____________________________________________________________].
3. Ground for modification
Select and explain each ground relied upon:
☐ Guideline review under § 20-2-311(a). The order was entered more than six months before this Petition, or has not been adjusted within six months of this Petition. Applying the current presumptive calculation would change the monthly support amount by at least 20% from the existing order. Facts and dates: [____________________________________________________________].
☐ Substantial change under § 20-2-311(a). A substantial change of circumstances warrants modification, even if the 20% review route is unavailable. The change occurred on or about [__/__/____] and consists of: [____________________________________________________________]. Attach supporting facts and records.
☐ Three-year review under § 20-2-311(a). At least three years have elapsed since the relevant support-order review. Petitioner requests review and, if appropriate, adjustment under the guidelines. Date and supporting facts: [____________________________________________________________].
4. Medical support and arrears, if applicable
- ☐ Petitioner asks the Court to review the medical-insurance obligation and allocate uncovered medical costs as follows: [____________________________________________________________].
- ☐ As of [__/__/____], unpaid child support under the existing order totals $[________], based on the attached payment record. ☐ Unpaid medical expenses under that order total $[________], based on attached bills and receipts. Petitioner requests a judgment for amounts the evidence establishes. ☐ No arrears judgment is requested.
- ☐ Petitioner asks for a departure from the presumptive amount. Specific facts why that amount would be unjust or inappropriate, for findings under Wyo. Stat. § 20-2-307(b): [____________________________________________________________].
5. Request for relief
Petitioner asks the Court to:
- Determine that it may modify the current order and grant a review or modification on the ground proved above;
- Require the parties' court-approved financial affidavits or receive testimony as required by § 20-2-308(a), determine the presumptive amount under § 20-2-304, and set a specific modified monthly amount of $[________], or another amount supported by the evidence and required findings;
- Determine the effective date in the order based on applicable law and the record;
- Enter an income-withholding order under Wyo. Stat. § 20-6-204(a). Any alternative arrangement must be written, signed, reviewed, and entered by the Court; any exception for good cause requires the Court's findings;
- Resolve the requested medical-support and arrears issues, if any; and
- Grant other relief supported by the pleadings and law.
6. Verification
I, [PETITIONER FULL NAME], being duly sworn, state that I have read this Petition and that the factual statements in it are true and correct to the best of my knowledge, information, and belief.
Petitioner's signature: [________________________________] Date: [__/__/____]
Printed name: [________________________________]
Mailing address: [________________________________]
Telephone / email: [________________________________]
State of [____________________], County of [____________________]. Subscribed and sworn before me on [__/__/____].
Clerk / notarial officer: [________________________________] Commission expires: [__/__/____]
Filing and service checklist
☐ Use the existing case number and file in the Clerk of District Court's office where the original support order was entered, following CSMP 02. If another state issued the order, establish the proper jurisdiction and registration route before filing.
☐ Complete the current CSMP petition, Confidential Statement of the Parties for Child Support Order, and Summons as instructed; the Clerk issues the Summons. Ask the Clerk for the current filing fee or fee-waiver forms.
☐ Serve the filed Petition, issued Summons, and required confidential statement, or use the packet's notarized Acknowledgment and Acceptance of Service. File proof of service and observe the response period stated in CSMP 02.
☐ Exchange initial disclosures with the other party within the period in CSMP 02; the instructions say not to file those disclosures with the Court. Complete the court-approved financial affidavit, support computation, proposed order, and income-withholding form when the packet calls for them.
☐ Keep paying the full amount under the existing order until a new order is entered. (Wyoming Judicial Branch CSMP 02.)
Official sources: Wyoming Title 20 · Wyoming Judicial Branch child-support forms
About this template
- Last updated
- October 13, 2026
- Citations checked
- October 13, 2026
- Jurisdiction
- Wyoming
- Category
- Family Law
Legal authority
- Wyo. Stat. § 20-2-304 (presumptive child support)
- Wyo. Stat. § 20-2-307(b) (deviation findings)
- Wyo. Stat. § 20-2-308 (financial affidavits)
- Wyo. Stat. § 20-2-311(a) (review and modification)
- Wyo. Stat. § 20-6-204(a) (income withholding order)
Family law covers the paperwork that shapes divorce, custody, child support, adoption, guardianship, and other family matters. These filings are emotional and high-stakes, and they also have to meet strict procedural rules for service, financial disclosure, and parenting plans. Clean, accurate paperwork keeps the focus on getting a workable outcome for the family instead of getting derailed by technical problems that delay hearings or force amended filings.
Not legal advice
This template is provided for informational purposes. We recommend having an attorney review any legal document before signing, especially for high-value or complex matters.
Checked against the law it cites
A reviewer verified this template's legal citations against the official source on October 13, 2026.
Wyo. Stat. § 20-2-304(a) (checked October 13, 2026): "Child support shall be expressed in a specific dollar amount. The following child support tables shall be used to determine the total child support obligation considering the combined income of both parents."
Wyo. Stat. § 20-2-308(a) (checked October 13, 2026): "No order establishing or modifying a child support obligation shall be entered unless financial affidavits on a form approved by the Wyoming supreme court which fully discloses the financial status of the parties have been filed, or the court has held a hearing and testimony has been received."
Wyo. Stat. § 20-2-307(b) (checked October 13, 2026): "A court may deviate from the presumptive child support established by W.S. 20-2-304 upon a specific finding that the application of the presumptive child support would be unjust or inappropriate in that particular case."
Wyo. Stat. § 20-2-311(a), six-month review (checked October 13, 2026): "Any party, or the department of family services in the case of child support orders being enforced by the department, may petition for a review and adjustment of any child support order that was entered more than six (6) months prior to the petition or which has not been adjusted within six (6) months from the date of filing of the petition for review and adjustment."
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