Massachusetts Joint Affidavit to Change Name of Parent Due to Their Change in Sex Designation on a Minor's Birth Certificate (R-120)
Official state formCorrections and amendmentsForm R-120Free downloadLast verified November 10, 2026
Affidavit to amend a minor child's Massachusetts birth certificate so it shows a parent's new legal name after that parent's change in sex designation. It goes to the Registry of Vital Records and Statistics or the clerk in the city or town of birth.
Who can use this form
- Parent 1 and Parent 2 of a child under 18 born in Massachusetts. The form has signature lines for both parents.
- A court-certified legal name change decree for the parent is required.
- The affidavit is signed under the pains and penalties of perjury.
What to send with it
- The completed joint affidavit. If it is mailed to the registry, it must be notarized.
- A court-certified copy of the parent's legal name change decree.
- A check or money order for all fees, payable to the Commonwealth of Massachusetts.
- In person at the registry (by appointment): a valid photo ID.
- The affidavit may also be filed at the clerk's office in the city or town of birth.
Where to send it
- Mail to
- Registry of Vital Records and Statistics Attn: Amendments 150 Mt. Vernon Street, 1st Floor Dorchester, MA 02125
- State fee
- $50.00 one-time amendment fee plus $32.00 per certified copy of the amended birth record by mail ($20.00 in person), per the office's fact sheet. Fees at city and town clerk offices vary by community.
- Typical processing
- Not provided
- Form revision
- 10/31/2025
- Source
- Official government page