A presumed father is a man Arizona law treats as the legal father based on specific circumstances being married to the mother at the time of birth, signing the birth certificate, signing a voluntary acknowledgment of paternity, or openly treating the child as his own and establishing a parental relationship.

The presumed father presumption can be challenged but within specific time limits and under specific circumstances. Once the window for challenge closes the presumption becomes legally conclusive in many situations.

Presumed father status creates both rights and obligations. A presumed father has the right to seek legal decision making and parenting time. He also has the obligation to pay child support.