In general, if there has been a substantial change in a person's financial circumstances -- salary cut, termination, onset of terminal illness, etc. -- they may petition the court to lower the amount of their monthly child support payments. It should be noted, however, that the court will take a multitude of factors into consideration when making this important decision.
Counties around the state of Minnesota collected $582.9 million for back child support in 2011. One particular county in Minnesota collected more than $3,000 per case in both 2011 and 2012. The average collected per case is $2,397.