In Colorado, there are a few different ways for paternity to be established. First, if a couple is married or they separated shortly before the birth of a child, the man is presumed by the state to be the father.
If the parents are not and have never been married, the father may sign an affidavit of paternity or allow his name to be included on the birth certificate. If someone outside of the relationship is thought to be the father or there are doubts to paternity coming from either the father or mother, a paternity test will need to be administered.
Costs and Establishing Paternity