Montana Acknowledgment of Paternity for Legitimation
Official state formParentage and paternityFree downloadLast verified November 10, 2026
For natural parents who married each other after the child was born. The father and mother acknowledge paternity and ask Montana Vital Records to change the birth record. The child's last name may be changed.
Who can use this form
- The natural father, now married to the child's mother
- The child's mother
- Each parent's signature must be notarized
- Only the child's last name can be changed
What to send with it
- The notarized form signed by both parents
- The form states that all documents and the original certificate are placed in a sealed file that can only be opened by court order
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