The Child Support Enforcement (CSE) Program is run by states and counties, and they are the best source of information about your case. If you are working with your local agency, but are not getting support payments, contact your state CSE agency and ask them what more can be done.
The state should be able to pull up your case and may have suggestions about other things to try.
Many state and tribal websites provide a link for asking questions. Most of them list the telephone numbers and addresses of the local CSE offices as well.
If the other parent can do things like work for cash to hide income or assets, or move often, the CSE agency may not be able to enforce the order. In difficult cases like these, you can write to the state and federal regional offices to ask for a review of your case. If you write, include as much information as you can, including identifying information like:
Tell the caseworker everything you can that might help the caseworker to help you and your family.
If you are not working with the CSE agency and would like to apply for services, you can ask your state or local CSE office how you can apply. Telephone numbers and addresses of your local office can be found on most state websites.