If a parent believes that a child support obligation should be terminated, he or she should write a letter to the local county FSD office, which can be found at the Missouri Child Support County Offices website. The letter should include the following: Parent's name, the other parent's name, and the child/ren names.
Although parents can enter into agreements about child support, such agreements must meet the guidelines set by law and receive court approval. This is because the right to receive support belongs to the child—not the parents. Parents can't waive their child's right to support.
The good news is yes, child support arrears can potentially be forgiven. You would need to have a joint petition filed along with the other parent though, showing that you are both in mutual agreement and jointly requesting that the arrears be waived or forgiven.
It's possible to request the court to waive child support arrears owed to the other parent. Both parents must agree on how the arrears are settled, such as by paying only part of the total amount and waiving the remaining balance.
In your letter, you must identify who you are, state specifically what your change in circumstance is, and definitively request a review of your case. You will send this letter to the CSE caseworker assigned to your case in the regional office that enforces your order. You can find that information on the CSE website.
First, Nevada law allows a parent to recover child support for the four years prior to the filing of a legal case. Second, this four year limitation can be tolled (meaning it is stayed) by sending a letter to the paying parent's last known address.