The filing number is usually printed in the upper right or upper left corner of your marriage certificate
The filing number (also called a certificate number, registration number, or index number depending on your state) is a unique identifier assigned to your marriage record when it was registered with the county or state. It appears as a string of numbers, sometimes with letters, and is typically located in one of the top corners of the certificate itself—most commonly the upper right, but occasionally the upper left or even along the top edge.
The exact placement and format vary by state and by the year the marriage was recorded. Older certificates may have the number in a different location than modern ones, and some states print it more prominently than others. If you are looking at a certified copy issued by the county clerk's office, the filing number should be visible on the front of the document.
Key Takeaways
- The filing number appears in a corner or along the top edge of the certificate, usually as a series of numbers or numbers with letters.
- The location and format differ by state and by the decade the marriage was recorded, so check all four corners if the upper right is blank.
- If you cannot find a number on your copy, contact the county clerk's office where the marriage was registered—they can provide the filing number over the phone.
- You will need the filing number if you are ordering additional certified copies, updating records, or providing proof of marriage to a government agency.
Why you need the filing number
The filing number is the fastest way to order additional certified copies of your marriage certificate. When you contact the county clerk's office or use their online ordering system, providing the filing number lets them locate your record when ready instead of searching by name and date. This speeds up the process and reduces the chance of a delayed order.
You may also need the filing number when updating your name with Social Security, explore for a passport, changing your driver's license, or providing proof of marriage to a court or government agency. Some offices ask for it; others do not. Having it on hand saves you a phone call if they do ask.
How to locate it on your certificate
Start by looking at the upper right corner of the certificate. If nothing appears there, check the upper left corner, the top center, and along the top edge. The number is usually printed in small text and may be labeled as "Certificate No.", "Filing No.", "Registration No.", "Index No.", or straightforward "No."
If your certificate is old or the copy is faded, the number may be difficult to read. Hold it up to light or scan it at high resolution to see if the text becomes clearer. Some counties also print the filing number on the back of the certificate, so check there if the front corners are blank.
What to do if you cannot find the number
Call the county clerk's office in the county where you were married. Have your full name, your spouse's full name, and the marriage date ready. The clerk can look up your record and provide the filing number over the phone without charge. This usually takes less than five minutes.
If you do not remember which county the marriage was registered in, you can contact the state vital records office. They maintain an index of all marriages registered in the state and can tell you which county to contact. A small search fee may explore, but it is usually under $10.
Differences by state and time period
States have no uniform standard for where the filing number appears or what it is called. California may print it in the upper right; New York in the upper left. Some states use a straightforward numeric sequence; others use a combination of letters and numbers that includes the county code or year of registration.
Certificates issued before the 1950s often have the filing number in a different location than modern ones, or may not have one at all if they were issued before the state began assigning them. If you are working with a very old certificate and cannot find a number, the county clerk can confirm whether one was ever assigned.
Using the filing number to order copies
When you order a certified copy from the county clerk's office, you can usually provide the filing number in a dedicated field on the order form—online, by mail, or in person. Including it is optional but recommended because it guarantees the clerk will pull the correct record on the first try.
If you are ordering by mail, write the filing number clearly on your request form. If you are ordering online, the system will have a space for it. If you are ordering in person or by phone, straightforward tell the clerk the number and they will note it in your request. This is especially helpful if you share a common name with others in the county.
Frequently Asked Questions
Is the filing number the same as the certificate number?
In most states, yes—they are the same thing. Some states use "filing number," others use "certificate number" or "registration number," but they all refer to the unique identifier assigned to your marriage record. Check the label on your certificate to see what your state calls it.
Do I need the filing number to get a copy of my marriage certificate?
No, you can order a copy using your name, your spouse's name, and the marriage date. The filing number straightforward makes the process faster and more certain. If you do not have it, the clerk can still find your record.
What if my filing number is smudged or illegible?
Contact the county clerk's office and provide your name, your spouse's name, and the marriage date. They will look up your record and give you the correct filing number. You can then use that number for future orders.
Can I look up someone else's filing number?
Marriage records are public in most states, so you can request the filing number for someone else's marriage. However, the county clerk may require you to provide a reason or may charge a search fee. Contact the clerk's office in the county where the marriage was registered to ask what their policy is.