Child support court (family court) makes decisions regarding the dollar amount of payments made for the care of minor children whose parents are divorced or separated. Generally, the non-custodial parent is required to pay a percentage of his or her net income based on state guidelines. In cases of joint custody, parents may share expenses informally, especially if the child spends an equal amount of time with each parent. If a parent who has been ordered to make support payments fails to do so, the state may file for a citation of contempt in child support court. This can result in fines or jail time for the offender. Either party may ask for a review of the level of support ordered. A family law judge may review and adjust the level of support owed. In some cases, back child support that is owed may be waived. This can happen if there is no longer a current order in effect and the amount owed is minimal.