The back of your driver's license holds information the front doesn't show
The back of your driver's license contains details that identify you to law enforcement, verify your address, and flag any restrictions on your driving privileges. Unlike the front, which shows your photo and basic name and address, the back typically displays your signature, a barcode or magnetic stripe, and codes that mean specific things to police officers and DMV staff.
What appears on the back varies by state — some states print more information there than others, and the format changes periodically as states update their security features. Understanding what's printed there helps you know what information you're carrying and why it matters if your license is lost or used fraudulently.
Key Takeaways
- The back of your driver's license usually shows your signature, a barcode or magnetic stripe, and restriction codes that tell officers what you can and cannot do while driving.
- Restriction codes like "B" for corrective lenses or "M" for manual transmission only are printed on the back so officers can verify them during a traffic stop.
- Your address appears on both the front and back, so updating your address at the DMV changes both sides of your license.
- The barcode or magnetic stripe on the back encodes your license number, name, and other identifying information that officers can scan during a stop.
Restriction codes and what they mean
The back of your license lists any restrictions placed on your driving privileges. These are single letters or short codes that tell a police officer when ready what you are and are not allowed to do. A restriction code of "B" means you must wear corrective lenses (glasses or contacts) while driving. A code "M" means you can only drive a manual transmission vehicle. Other common codes include "H" for hearing impaired, "N" for no towing, and "D" for daylight driving only.
If you have a restriction and violate it — for example, driving without your required glasses — you can be cited even if you were not breaking any other traffic law. The officer can see the restriction when ready by looking at your license, which is why it is printed where it is visible during a traffic stop.
Restrictions are added when you first get your license based on your vision test, medical history, or the type of vehicle you drove during your test. If your circumstances change — your vision improves, for instance — you can request that a restriction be removed by visiting your DMV office and taking a new vision test.
The barcode and magnetic stripe
Most driver's licenses have either a barcode or a magnetic stripe on the back that encodes your license number, full name, date of birth, address, and sometimes your signature. When a police officer scans your license during a traffic stop, they are reading this barcode or stripe to pull up your record on their in-car computer.
The barcode or stripe is also used by businesses that check ID — bars, retailers, and age-restricted venues scan it to verify your age and identity quickly. The information encoded is the same as what is printed on the front and back of your license, so scanning it does not reveal anything hidden.
If the barcode or stripe becomes damaged — scratched, cracked, or worn — it may not scan properly. If this happens, you can request a replacement license from your DMV. A damaged barcode does not make your license invalid, but it can slow down transactions or traffic stops.
Your signature on the back
Your signature appears on the back of your driver's license and serves as a security feature and a way to verify your identity. When you renew your license or get a new one, you sign in front of a DMV employee, and that signature is printed on the back of the card.
Your signature on your license is compared to your signature on documents like checks or credit card receipts to verify that you are the person presenting the ID. It is also used by law enforcement to confirm identity during traffic stops or other interactions.
If your signature changes significantly over time — which is normal — your license is still valid. You do not need to update your signature unless you renew or replace your license for another reason.
Address information on both sides
Your current address appears on both the front and back of your driver's license. When you move, you must update your address at the DMV, and both sides of your license will be updated or a new license will be issued, depending on your state's rules.
Some states print the address on the front only, some on the back only, and some on both. Regardless of where it appears, your address is the one the DMV has on file for you. If you move and do not update your address, your license will show an outdated address, which can cause problems if you are stopped by police or need to verify your current residence.
Security features and anti-fraud measures
The back of your license includes security features designed to prevent counterfeiting and fraud. These may include holograms, microprinting, color-shifting ink, or other visual elements that are difficult to replicate. Different states use different security features, and they change over time as technology advances.
These features protect you by making it harder for someone to create a fake license using your information. If you lose your license or suspect it has been stolen, report it to your DMV when ready so it can be deactivated. A deactivated license cannot be used fraudulently, even if someone finds it.
What to do if the back of your license is damaged or unreadable
If the back of your license is scratched, cracked, faded, or otherwise damaged so that the barcode, signature, or information is no longer clear, you can request a replacement from your DMV. Bring your current license and a form of payment — the cost varies by state but is usually between $20 and $50.
A damaged license is still legal to use while you wait for a replacement, but you may encounter delays at businesses or during traffic stops if the barcode cannot be scanned. Some states offer expedited replacement for an additional fee if you need a new license quickly.
Frequently Asked Questions
Can I cover the barcode on the back of my license?
No. Covering, altering, or obscuring the barcode, magnetic stripe, or any other part of your license is illegal in most states and can result in a citation. The barcode must remain visible and scannable for law enforcement and businesses to verify your identity.
Why does my license have a restriction code I don't remember getting?
Restrictions are added based on your vision test, medical history, or the type of vehicle you used during your driving test. If you took your test in an automatic transmission vehicle, you may have received an "M" restriction for manual transmission. If you do not believe the restriction is correct, contact your DMV to discuss removing it.
Does the information on the back of my license match what's on the front?
Yes. Your name, address, license number, and date of birth should be identical on both sides. If they do not match, contact your DMV when ready — this may indicate an error or fraud.
What happens if someone scans the barcode on my license?
When the barcode is scanned, it displays the same information that is printed on your license — your name, address, license number, and date of birth. No hidden information is revealed. Businesses and law enforcement scan it for verification purposes only.
Do I need to memorize the codes on the back of my license?
No. The codes are for law enforcement and DMV staff to read. You should know whether you have any restrictions — such as needing corrective lenses — but you do not need to memorize the letter codes themselves.