Hey all- a friend of mine was served for child support for a child not biologically his. Their relationship lasted less then 2 years, and said child lived with them for maybe 1 yr? The child lived many years with his grandparent and was a teenager when my friend and his mother got together. She has never gone after child support from the child's biological father even though her son does see him on occasion. Does my friend still have to pay? I don't know because I can't find any info on this unique situation online. They broke up 2 years ago, and she is going after him for back suport as well so this is a significant amount of money he may owe. Thanks!!