Where paternity of the child is in question, any party with an interest may ask the court to determine paternity, of one or several potential fathers (called putative father) based initially upon sworn statements and then upon testimony, including but not limited to:

• Sexual relations by the mother with a man other than the putative father, with a description of the circumstances of the child's conception
   

• Lack of access to the mother by the putative father during the same time period
   

• Scientific proof (blood group, HLA marker, DNA testing, etc.) showing the likelihood of putative father being genetically related
   

• Other admissible evidence that may tend to establish paternity such as statements against interest made by the putative father

Paternity can also be established at a court or administrative hearing or by default if the man was served notice of a paternity hearing but did not appear. Parents are not required to apply for child support enforcement services when acknowledging paternity. An acknowledgment of paternity becomes a finding of paternity unless the man who signed the acknowledgment denies that he is the father within 60 days. Generally, this finding may be challenged only on the basis of fraud, duress, or material mistake of fact.