The audit number is a security code printed on your driver's license that helps verify the document is genuine
The audit number on your driver's license is a unique code assigned by your state's Department of Motor Vehicles (DMV) when your license is issued or renewed. It appears as a series of numbers or alphanumeric characters, usually printed on the back of the card or in a specific location on the front, depending on your state's design. The audit number serves as an internal tracking and verification tool — it lets officials confirm that your license was legitimately produced by the DMV and hasn't been altered or counterfeited.
Each time a license is printed, the DMV generates a new audit number tied to that specific card. If you renew your license, you'll receive a different audit number on the new card. This system helps law enforcement, businesses, and government agencies quickly verify that a license is real when they scan or inspect it.
Key Takeaways
- The audit number is a unique code printed on your driver's license by your state's DMV to track and verify the document's authenticity.
- Each license receives its own audit number when it is issued or renewed, so your number changes every time you get a new card.
- The audit number's location varies by state — it may appear on the front, back, or in a specific security area of the license.
- You typically do not need to memorize or provide your audit number in everyday situations; it is mainly used by officials verifying the license itself.
Where to find the audit number on your license
The location of the audit number depends on your state's driver's license design. Most states print it on the back of the card, often near the bottom or in a corner. Some states place it on the front in a designated security area, sometimes near the barcode or magnetic stripe. A few states embed it within the barcode itself, so it is not visible as printed text.
If you cannot locate it on your card, check your state's DMV website — they typically provide a diagram showing where each security feature, including the audit number, appears on the current license design. You can also call your state DMV directly and ask where the audit number is positioned on licenses issued in your state.
Why the audit number matters for verification
When a police officer, bank teller, or business scans your license, the audit number is part of the data they retrieve. It confirms that the license was produced by an authorized DMV printer and matches the official record on file. If someone tries to forge or alter a license, the audit number typically will not match the DMV's database, which alerts the person checking the document that something is wrong.
This verification system protects both you and the organizations checking your ID. It prevents fraudulent licenses from being used for identity theft, underage drinking, or other illegal purposes. The audit number is one of several security features — along with holograms, watermarks, and microprinting — that make modern driver's licenses difficult to counterfeit.
When you might need to reference your audit number
In most everyday situations, you will not need to provide or reference your audit number. You straightforward show your license, and officials or businesses verify it by looking at it or scanning it. The audit number is primarily an internal tool for the DMV and law enforcement.
There are rare cases where you might need it — for example, if you are reporting your license lost or stolen, the DMV may ask for it to confirm which specific card you are referring to. If you are involved in a legal matter and need to prove which version of your license was in use at a particular time, the audit number could be relevant. In these situations, the DMV or your attorney will tell you if they need it.
How audit numbers differ from other license numbers
Your driver's license contains several different numbers, and it is straightforward to confuse them. Your driver's license number is your primary identifier — it stays the same throughout your life (in most states) and is what you use to look up your driving record or renew your license. The audit number, by contrast, is specific to that physical card and changes every time you renew.
Your license also displays your date of birth, a control number (sometimes called a document number), and possibly a barcode or magnetic stripe with encoded data. Each serves a different purpose. The audit number is the one specifically designed to prevent counterfeiting and verify that the card itself is authentic.
What to do if you cannot find your audit number
If you are looking at your license and cannot locate the audit number, first check your state's DMV website for a visual guide to your license's security features. The guide will show you exactly where the audit number appears and what it looks like. If your license is very old or from a state you recently moved from, the design may be different from current licenses, which can make the audit number harder to spot.
If you still cannot find it, contact your state's DMV directly — you can usually reach them by phone or through their website. They can tell you where the audit number is on your specific license or provide a replacement card if yours is damaged or illegible. There is no charge for this information, and the DMV staff are accustomed to these questions.
Frequently Asked Questions
Is the audit number the same as my driver's license number?
No. Your driver's license number is your main identifier and typically stays the same for life. The audit number is a separate security code specific to each physical card and changes when you renew your license.
Do I need to memorize my audit number?
No. The audit number is for verification purposes and is used by officials checking your license, not by you in daily life. You do not need to memorize it or carry it separately.
What happens if my audit number does not match the DMV database?
A mismatch usually indicates the license is counterfeit, altered, or from a different state than claimed. If this occurs during a verification check, the person scanning your license will flag it and may contact law enforcement or refuse to accept it.
Will my audit number change if I renew my license?
Yes. Every time you renew your license and receive a new physical card, the DMV assigns a new audit number to that card. Your driver's license number may stay the same, but the audit number will be different.
Can I look up my audit number online?
Most states do not display the audit number in their online license lookup systems. You can find it by looking at your physical license card or by contacting your state's DMV directly.