The concern is with child support in Michigan. I have been served papers to determine paternity of a child that is 7 years old. 7 years ago I had a dating relationship (never married) with the childs mother and we separated when I found out she was cheating on me with someone else. It was discussed that he may have been the father. After that I was never court ordered or even asked to prove paternity. I assumed the child was indeed his all of these years (I moved away for work etc). My question is, I now have been court ordered to prove paternity and the court ordered date is 11/2009 when it was filed with the court. If the child is in fact determined to be mine through DNA testing will I have to pay backdated child support from birth with no knowledge of the child even being my responsibility at that time? Or would it start from the date of the court filing in 2009? I am also a single father and I have full custody of my son from a marriage/divorce along with partial custody of my daughter (both from my ex wife, no relation to current case). I don't know how this will factor in to this also and with child support owed.