Montana Affidavit of Nonpaternity
Official state formParentage and paternityFree downloadLast verified November 10, 2026
The mother and her husband each swear that the husband, though married to the mother at the child's conception or birth, is not the child's parent and should not be listed on the Montana birth certificate.
Who can use this form
- The mother's husband, who was married to her at the time of conception or birth
- The mother of the child
- Each signature must be notarized, and the notary must verify the signer's ID
What to send with it
- The notarized form signed by both the husband and the mother
- A Paternity Acknowledgment as well, if the biological father is to be listed on the birth certificate
Where to send it
- Mail to
- See the form for where to file it.
- State fee
- Not provided
- Typical processing
- Not provided
- Source
- Official government page