Information on child support is available on the Minnesota Judicial Branch Self-Help Center. For a detailed description of the child support law, go to 
Minnesota's Child Support Laws: An Overview, written by the Minnesota House of Representatives.
Forms
Forms for child support are available on the Minnesota Judicial Branch website. District Court forms must be used if the county is not involved in your case. Expedited process (ex pro) forms are used only when County services are involved in your case.
Changing child support payments
To change the amount of child support that you pay or receive, start by downloading and completing the forms on the Minnesota Judicial Branch Motion to Modify Child Support and/or Spousal Maintenance page.
If a motion has been filed against you, complete the forms on the Minnesota Judicial Branch Response to Motion to Modify Child Support and/or Spousal Maintenance page.
Late or missed child support payments
If your ex isn’t paying child support ordered by the court, you can notify the court by completing the following forms from the Minnesota Judicial Branch:
Instruction Guide for Docketing of Child Support Judgment
Child Support Docket Form