What Is DNA Testing
DNA testing is a genetic analysis used to establish or exclude biological parentage. In divorce and family law, it determines who is legally presumed to be a child's biological parent, which directly affects custody, visitation, and support obligations.
Courts order DNA tests when paternity is disputed or unclear. The test compares DNA samples from the alleged parent and child to calculate the probability of biological relationship. Results showing 99.9% or higher match are considered conclusive proof of paternity in most U.S. jurisdictions.
When Courts Order Testing
DNA testing becomes relevant in several divorce and custody scenarios:
- One spouse questions whether a child born during the marriage is biologically theirs
- A child was born outside marriage and paternity is contested
- Child support is being established and the obligor denies biological parentage
- Custody or visitation arrangements depend on confirming biological relationship
- Inheritance or benefits claims require proof of biological kinship
Legal Process and Costs
Either spouse or the court itself can request DNA testing. Under the Uniform Parentage Act, adopted by most states, courts have authority to order testing when paternity is at issue. The requesting party typically bears the cost, usually $300 to $500 per person tested. If the obligated parent loses the case, they may be ordered to pay testing expenses plus legal fees.
The test itself is noninvasive: a buccal swab collects cells from inside the cheek. Results typically arrive within 3 to 5 business days. Chain-of-custody documentation is critical for courtroom admissibility.
Impact on Custody and Support
DNA results reshape custody and financial obligations. If testing proves a spouse is not the biological parent, they may have grounds to modify or terminate child support obligations, though some states recognize equitable estoppel if the non-biological parent has acted as the child's parent for a significant period.
Conversely, if results confirm paternity, the obligor typically owes retroactive child support back to the date the case was filed, and sometimes to the child's birth date depending on state law.
Common Questions
- Can someone refuse a DNA test? Not typically in court-ordered cases. Refusal can result in contempt of court charges or adverse inference, where the judge assumes the refuser's paternity claim is false.
- Do I need consent to test a child? If the court orders testing, consent is not required. If testing is done voluntarily, most states require consent from the child's custodial parent or guardian.
- How long does testing affect my custody arrangement? Test results are permanent and can be used throughout the child's life for inheritance, Social Security benefits, or future custody disputes. Custody orders often remain unchanged until either party petitions the court for modification.