A previous post on this blog discussed how difficult it can be to figure out how much income each parent of a child makes so that a court can determine the proper amount of child support each parent should be responsible for. Particularly when a parent does not make regular income, is self-employed or otherwise get paid in cash, challenges in calculating income are relatively easy to come by.
On a related point, it can also be difficult to know what to do when a parent loses his or her job. Ordinarily, an unemployed parent will not have to pay as much child support as would a parent who is employed full time. However, this general principle assumes that all parents act in good faith when they either lose or cannot find a job.