The Iowa Court of Appeals recently reviewed what remedies are available when a parent fails to pay child support. In John Martin Farrell v. Iowa District Court for Polk County, the Iowa Court of Appeals annuled the district court's finding that a father was in default for failing to pay extracurricular activities but sustained a finding of contempt.
A parent refusing to pay child support or other support such as extracurricular activities (when required by the decree) is a common occurrence. In its decision, the Farrell court outlined the difference between "contempt" and "default." If a parent "willfully" fails to pay child support on time there is a good chance s/he will be found in contempt--or willful noncompliance with a court order. There are defenses to a charge of nonpayment of support as outlined in the Farrell ruling.
A court can also find that although the payor's behavior wasn't willful, s/he nonetheless contravened the decree and issue a finding of default, or a technical violation. Either way, both of these may be viable options if a parent fails to pay support in a timely fashion.