Illegal? No, at least as to the revealed facts. However, the court that entered the support order for the one man -- and the one that entered the child support agency collection, if that is the other man, would each be interested in the fact of collections from the other, which could/should lead to reduction or elimination of one or the other orders. See child support information posted here.
Answered on Jan 07th, 2019 at 3:27 PM