Can a biological father challenge paternity when the marital father assumed responsibility? Pearson v. Pearson Explained

In Pearson v. Pearson, the Utah Supreme Court addressed whether a biological father has standing to challenge a marital father’s presumption of paternity when the marital father voluntarily assumed parental responsibility for a child conceived outside the marriage.

Background and Facts

Z.P. was conceived during an extramarital affair between Kimberlee Pearson and Pete Thanos while Kimberlee was married to Kelly Pearson. Although both Kelly and Thanos knew of Thanos’s biological paternity during the pregnancy, Kelly agreed to raise Z.P. as his own son. Kelly was listed as the father on Z.P.’s birth certificate and developed a strong father-son relationship with the child. After the Pearsons divorced, Thanos married Kimberlee and sought to intervene in the divorce proceedings to establish his paternity of Z.P.

Key Legal Issues

The central issue was whether Thanos had standing to challenge Kelly’s presumption of paternity under Utah’s Schoolcraft test. This test evaluates paternity challenges based on two policy considerations: (1) preserving the stability of marriage, and (2) protecting children from disruptive and unnecessary attacks on their paternity.

Court’s Analysis and Holding

The Utah Supreme Court affirmed the court of appeals’ denial of Thanos’s intervention. The Court held that the policy of preserving marital stability extends beyond the marriage itself to protect parent-child relationships created during the marriage. When a marital father voluntarily assumes parental responsibility for a child born into the marriage and establishes a father-child relationship, any challenge to his paternity is both disruptive and unnecessary under Schoolcraft. The Court distinguished this case from previous decisions where marital fathers had been separated from mothers or had never developed relationships with the children in question.

Practice Implications

This decision significantly limits biological fathers’ ability to challenge paternity presumptions in Utah. Practitioners should carefully evaluate whether the marital father voluntarily assumed responsibility and whether a meaningful parent-child relationship exists before pursuing paternity challenges. The Court’s broad interpretation of the Schoolcraft test emphasizes protection of established family relationships over biological connections, even when the marriage ends in divorce.