An audit number is a tracking code printed on your driver license that the DMV uses to verify the document's authenticity and link it to your record

Every state's driver license includes an audit number — sometimes called a document number, control number, or transaction number depending on your state. This number appears somewhere on the front or back of your license and serves as a unique identifier for that specific physical card. When a police officer, employer, or government agency scans or manually checks your license, they can use the audit number to confirm the license is real and matches the person holding it.

The audit number is not the same as your driver license number (which is your main identification number on the license). It is not the same as your Social Security number. It is purely a manufacturing and verification tool that the DMV created when your license was printed. If you renew your license and receive a new card, you will get a new audit number.

Key Takeaways

  • An audit number is a unique code on your physical driver license that the DMV uses to verify the card is genuine and matches your record.
  • The location of the audit number varies by state — check your license front or back, or contact your state DMV if you cannot find it.
  • You may need to provide your audit number when renewing your license, replacing a lost or damaged card, or responding to a DMV inquiry.
  • If your audit number does not match your DMV record, contact your state DMV directly to resolve the discrepancy before it affects your driving privileges.

Where to find your audit number on your license

The audit number's location depends on which state issued your license. In many states, it appears in small print on the back of the card, often near the bottom or in a corner. In others, it may be on the front near your photo or in the upper right corner. Some states print it vertically along the edge of the card.

If you cannot locate it on your physical license, contact your state's DMV directly — they can tell you exactly where it appears on licenses issued in your state. You can find your state DMV's phone number or website by searching "[your state] DMV" online. When you call, have your driver license number and date of birth ready so they can pull up your record quickly.

Why the DMV asks for your audit number

The DMV may ask you to provide your audit number when you renew your license, replace a lost or damaged card, or respond to a notice about your driving record. The audit number helps them confirm that you are the person who holds that specific license and that the card in their system matches the one in your wallet.

If you are renewing online or by mail, the renewal form may ask for the audit number as a security step. If you are renewing in person at a DMV office, the staff member will scan your current license, and the system will read the audit number automatically. You do not need to memorize it — just have your current license with you.

What to do if your audit number does not match your record

If the DMV tells you that your audit number does not match their system, do not ignore the notice. This usually means there is a data entry error, a scanning problem, or an issue with how your license was recorded when it was issued. Contact your state DMV as soon as you receive the notice and explain the discrepancy.

Bring your physical license and any DMV correspondence to a local DMV office, or call the number on the notice. The staff can investigate whether the problem is on their end (a database error) or on yours (a damaged or counterfeit card, though this is rare for legitimate licenses). They will tell you what steps to take next, which may be as straightforward as confirming information over the phone or requesting a replacement card.

Audit numbers and identity verification

Employers, banks, and government agencies sometimes ask to see your driver license as proof of identity. When they scan your license with a reader device, the audit number is part of what the scanner reads. This helps them confirm that the license is genuine and that the information on the card has not been altered.

You do not need to recite your audit number when showing your license — the person checking it will either scan it or read the information themselves. If someone asks you to provide your audit number over the phone or online, verify that you are speaking with a legitimate government agency or employer before you share it. Scammers occasionally pose as DMV staff to collect personal information.

Audit numbers and license renewals

When you renew your driver license, the DMV will issue you a new card with a new audit number. The old audit number becomes inactive and is no longer linked to your driving record. You should destroy your old license once you receive the new one — most states ask you to cut it in half or return it to the DMV.

If you renew online or by mail, the system will generate a new audit number automatically and print it on your replacement card. If you renew in person, the DMV staff will scan your old license, process your renewal, and print your new card on the spot. You will see the new audit number printed on the card before you leave the office.

Frequently Asked Questions

Is my audit number the same as my driver license number?

No. Your driver license number is your main identification number on the license and stays the same throughout your life (in most states). Your audit number is a separate code that the DMV assigned to that specific physical card and changes each time you renew or replace your license.

Can I look up my audit number online?

Most states do not display your audit number in their online DMV portals. You can find it by looking at your physical license or by calling your state DMV and asking them to read it from their system. Some states may show it in your online account if you log in, but this varies.

What happens if I lose my license before I find out my audit number?

You do not need to know your audit number to report a lost license or request a replacement. Contact your state DMV with your driver license number and date of birth, and they will process a replacement. Your new license will have a new audit number printed on it.

Do I need to memorize my audit number?

No. You only need to provide it if the DMV specifically asks for it, and you can look it up on your physical license at that time. There is no reason to memorize it for everyday use.