How to Change Your Last Name in Missouri After Marriage

To change your last name in Missouri after marriage, you don’t need a court order as long as you’re taking your spouse’s surname. The process runs as a chain: get a certified marriage certificate, use it to update your Social Security card, then use both to update your Missouri driver’s license, and work outward from there to your passport, bank accounts, employer, insurance, and everything else tied to your legal name. Most people finish the core government steps within a few weeks.

When You Need a Court Order Instead

Missouri lets you adopt your spouse’s last name straight from the marriage certificate with no court involvement. If you want something different — a hyphenated combination of both surnames, or a new last name that matches neither spouse — you’ll almost certainly need a formal court-ordered name change, which is a separate legal process with its own filings and fees. Every agency below will compare the name you’re requesting against what appears on your marriage certificate, so decide before you start.

Get a Certified Marriage Certificate First

Everything else depends on this document. After your ceremony, the officiant returns the signed marriage license to the Recorder of Deeds in the Missouri county where it was issued. Once that office records it, you can request certified copies in person, by mail, or online. Fees vary by county but typically run around $9 to $10 per copy.

The decorative certificate you may have received at the ceremony is not the same thing. Government agencies won’t accept it. Order at least three or four certified copies at the start, because several agencies require an original certified document rather than a photocopy, and running separate requests every time slows the whole chain down.

Update Your Social Security Card

Do this first among the government updates. The name in the Social Security Administration’s system needs to match what you use on your tax return, employment paperwork, and driver’s license application, so every later step gets easier once SSA has your new name on file. There’s no fee for a new card.1Social Security Administration. Form SS-5 – Application for a Social Security Card

Complete Form SS-5, the Application for a Social Security Card, available on the SSA’s website.1Social Security Administration. Form SS-5 – Application for a Social Security Card Submit it with your certified marriage certificate as proof of the name change and a current photo ID such as a U.S. driver’s license, state-issued ID, or passport. SSA requires original documents or copies certified by the issuing agency; photocopies and notarized copies won’t be accepted.2Social Security Administration. Learn What Documents You Will Need To Get a Social Security Card

Depending on your situation, you may be able to start the process online. Otherwise, submit by mail or schedule an appointment at a local SSA office.3Social Security Administration. Change Name with Social Security Expect the new card in the mail within about two weeks after SSA verifies your documents.4Social Security Administration. POMS RM 10205.100 – How Long Does It Take To Get an SSN Card Your Social Security number stays the same; only the name on file changes.

Update Your Missouri Driver’s License or State ID

Once SSA has your new name on record, visit a Missouri Department of Revenue license office to update your driver’s license or state ID. This step must be done in person.5Missouri Department of Revenue. How to Change Your Name When Married

Bring your certified marriage certificate as proof of the name change. You may also be asked for proof of your Social Security number, proof of date of birth, and proof of Missouri residency.5Missouri Department of Revenue. How to Change Your Name When Married At the office, you’ll apply for a duplicate license under your new name, retake your photo, and sign the new document. The fee for a duplicate Class E driver’s license (the standard non-commercial license) is $24.6Missouri Department of Revenue. Permit/Driver License/Nondriver ID Fees You’ll leave with a temporary paper ID and receive the permanent card by mail.

REAL ID at the Same Visit

Federal REAL ID enforcement took effect on May 7, 2025. You now need a REAL ID-compliant license (marked with a star or flag) or an acceptable alternative like a passport to board domestic flights and enter certain federal facilities.7Transportation Security Administration. REAL ID If your current license isn’t compliant, the name-change visit is a natural time to upgrade. Missouri’s REAL ID application requires a certified marriage license to verify any name change connecting your current legal name back to your birth certificate or lawful status document.8Missouri Department of Revenue. List of Acceptable Documents for REAL ID-Compliant Bring your birth certificate and any other linking documents so you can handle both updates in one trip.

Update Your U.S. Passport

Which passport form you use depends on when your current passport was issued relative to your marriage:

If you have travel booked, plan the passport update early. Your airline ticket must exactly match the name on the ID you present at TSA, so a mismatch between an old-name ticket and a new-name license can create problems at the airport.11Transportation Security Administration. Does the Name on My Airline Reservation Have To Match the Name on My Application Until your passport is updated, book flights under whichever name matches the ID you’ll actually carry through security.

Tax Returns and the IRS

The most common trip-up happens at tax time. The name on your return has to match the name SSA has on file for your Social Security number. A mismatch can delay processing and hold up any refund you’re owed.12Internal Revenue Service. Name Changes and Social Security Number Matching Issues

The fix is simple. If you haven’t updated your name with SSA before filing, use your former name on the return. Once SSA has processed the change, file future returns under your new name. There’s no separate IRS form or notification, because the IRS pulls name data directly from SSA records.12Internal Revenue Service. Name Changes and Social Security Number Matching Issues

Update Your Other Accounts and Records

With your marriage certificate, new Social Security card, and updated driver’s license, you have the documentation package that almost every other institution will ask for. Each has its own process, but the pattern repeats: show certified proof, verify your identity, request the update.

Work through the accounts tied to your finances and legal identity first:

  • Bank accounts and credit cards. Most banks handle this at a branch visit with your marriage certificate and new ID. Update linked accounts, joint accounts, and any safe deposit box at the same time.
  • Employer and payroll. Contact HR so your name matches on tax withholding forms, benefits enrollment, and retirement accounts.
  • Voter registration. Missouri lets you update this when you change your driver’s license, or separately through your county clerk.
  • Insurance policies. Health, auto, homeowner’s, and life insurance all need your legal name so claims don’t get delayed.
  • Property titles. Updating the name on a deed typically means filing a new deed with the county recorder’s office. Handle this sooner if you plan to refinance or sell.
  • Mortgage company or landlord. Notify them so payment records stay consistent.
  • Utility providers. A phone call or online update usually handles it.

No law forces you to finish every update by a specific date, but the longer the gap between your legal name and the name on your accounts, the more friction you’ll hit when proving your identity. Getting the high-priority items done in the first month or two after the wedding saves real trouble later.