My husband was told by a woman many years ago that he was the father of her child. He requested a paternity test and she became angry, refused to let him see the girl and moved away. She now found out where she resides in Mass. And he would like to began the process of establishing paternity, but we would like to know will he have to pay back child support from date of birth or date of establishing paternity?
Also, how difficult is it to get visitation rights for a 10 year old girl in Mass if paternity is established? :)

My husband was told by a woman many years ago that he was the father of her child. He requested a paternity test and she became angry, refused to let him see the girl and moved away. She now found out where she resides in Mass. and he would like to began the process of establishing paternity, but we would like to know will he have to pay back child support from date of birth or date of establishing paternity?
Also, how difficult is it to get visitation rights for a 10 year old girl in Mass if paternity is established? :)
Wow- how difficult is it to get visitation rights for a 10 year old girl in Mass if paternity is established?-It is not difficult.When paternity is established,the father has right to ask for visitation and it will be awarded.
2.will he have to pay back child support from date of birth or date of establishing paternity?
Very possible.There is no law or clear guidances for retroactive child support.It depends on the judge's point of view.The judge can decide that it is her fault not to ask for CS also the judge can decide that "both parents are obligated to support their child"... and to order retroactive support for 10 years.

If your husband file for paternity after 10 years... and he has suspected that he is the father I am /almost/ sure the Court will order back child support from the day of birth.
It is his fault not to ask for his rights and obligations.