Where Is the Document Number on Your License?

The document number on your driver’s license is usually printed on the back of the card, near the 2D barcode, and labeled “DD” for Document Discriminator. A smaller number of states put it on the front, often in a lower corner or along the bottom edge in a smaller font than the rest of the card. It’s an alphanumeric string, commonly 8 to 14 characters, though the national standard allows up to 25.1E-Verify. Tips for Entering Driver’s Licenses and ID Cards in E-Verify

Where to Look on the Card

Flip your license over. On most cards, you’ll see a short label reading “DD” printed near or just below the barcode, followed by a run of letters and numbers. That’s it. A few states use alternate labels such as “Doc #,” “Control No.,” or “Audit Number,” but “DD” is the common one because it follows the card design standard published by the American Association of Motor Vehicle Administrators.2AAMVA. AAMVA 2020 DL/ID Card Design Standard

If your state prints the number on the front, it tends to sit low on the card and may be in a smaller or lighter font than your name and license number. Still not finding it? Look for any number on the card you don’t recognize. You already know your license number and date of birth. The unfamiliar string you’ve never had to memorize is almost certainly the document number.

States label and position the field a little differently, so if a quick scan of both sides doesn’t turn it up, your state DMV website usually has a diagram showing every field on the card.

How It Differs From Your License Number

These are two separate numbers, and mixing them up is the most common mistake on forms that ask for the document number.

Your driver’s license number identifies you as a person. It generally stays the same across renewals, replacements, and address changes.

The document number identifies the specific plastic card in your wallet. Under the AAMVA standard, it “must uniquely identify a particular document issued to that customer from others that may have been issued in the past.”2AAMVA. AAMVA 2020 DL/ID Card Design Standard Every time the state prints you a new card, you get a fresh document number and the old one becomes invalid. That’s the whole point: anyone who checks the number can confirm you’re holding the most recent card the state issued, not an older or revoked one.

What “DD” Means

The label stands for Document Discriminator, a term that comes from the AAMVA’s 2020 DL/ID Card Design Standard. Under that standard, the Document Discriminator can serve as a document identifier, an audit tracking number, and an inventory control number.2AAMVA. AAMVA 2020 DL/ID Card Design Standard The number is generated based on factors like where and when the card was issued, with the exact formula varying by state.

The same value is also encoded inside the 2D barcode on the back of the card. When a scanner reads the barcode, it can compare the encoded number to the one printed on the surface. A mismatch suggests a fake or altered card.

When You’ll Need It

Day-to-day, almost nothing asks for your document number. A traffic stop, a credit application, a hotel check-in: all license number. The DD comes up in a short list of specific situations.

E-Verify (RIDE Program)

If your employer uses E-Verify and your state participates in the RIDE program (Records and Information from DMVs for E-Verify), the employer has to enter the document number from your license. E-Verify requires the number to be 8 to 14 alphanumeric characters, with no special characters allowed.1E-Verify. Tips for Entering Driver’s Licenses and ID Cards in E-Verify Not every state participates, but when yours does, the process won’t move forward without it.

Form I-9

When you start a new job and present a driver’s license as your List B identity document, your employer records the document title, issuing authority, document number, and expiration date in Section 2 of Form I-9.3USCIS. Completing Section 2 – Employer Review and Verification In most cases the “document number” the employer writes on the I-9 is the license number rather than the DD, but some employers or verification systems ask for both.

DMV Portals and Online Renewals

Some state DMV websites ask for the document number when you log in, renew online, or order a duplicate. The number proves you actually have the current card in hand, not just a memorized license number. This is where most people first discover the DD exists.

Finding It Without the Physical Card

The document number is tied to the specific card, which makes it harder to recover than a license number. You can’t just call and have it read to you the way you might with other account details. A few options:

  • Check an old photo or scan of your license, as long as it’s from your current card and not a previous version.
  • Log into your state DMV account. Some states display the DD there; others don’t.
  • Call or visit your state DMV. Some offices will look up the number on your most recent card. Many will tell you to request a replacement instead.
  • Order a duplicate license. Fees generally run between $10 and $45 depending on the state. The replacement arrives with a new document number, and the old one stops being valid for any verification.

Keeping the Number Safe

A driver’s license carries your full name, address, date of birth, photo, signature, license number, and document number on a single card. The DD specifically can help make a counterfeit look convincing to scanners that check the printed number against the barcode. Treat it with the same caution you’d give any sensitive identifier: don’t share it unless you know who’s asking and why, and be careful about texting or emailing photos of your license, since one image hands over both the license number and the DD at once.