Wyoming CSR 4. Response to Petition for Modification of Child Support and Judgment for Arrears is a response form used in the State of Wyoming when a party requests a modification of child support or judgment for arrears. This form is used by the responding party to indicate whether they agree or disagree with the petition for modification. It can be used in both initial and subsequent modification proceedings. There are two types of Wyoming CSR 4. Response to Petition for Modification of Child Support and Judgment for Arrears: an Unopposed Response and an Opposed Response. The Unopposed Response is used when the responding party agrees with the requested modification and the Opposed Response is used when the responding party does not agree with the requested modification. The form can be filled out either in person or via mail. The responding party must include the case number, the date of the hearing, and the date of the response. The form must be signed and dated by the responding party in order for it to be considered valid.