A lawsuit. Or a complaint filed in criminal, traffic, or civil court.

Source: California Courts.

A collection of people associated with a particular child support order, court hearing, and/or request for IV-D services. This typically includes a Custodial Party (CP), a dependent(s), and a Non-custodial Parent (NCP) and/or Putative Father (PF). Every child support case has a unique Case ID number and, in addition to names and identifying information about its members, includes information such as CP and NCP wage data, court order details, and NCP payment history.

(See also: Child Support; IV-D; IV-D Case; IV-A Case; IV-E Case)

Source: Office of Child Support Enforcement.