How Do ID Scanners Work?
Whether you're checking IDs at a bar, verifying customers at a liquor store, screening visitors, or protecting a business from fraud, ID scanners have become an essential tool for identity verification.
One of the most common questions businesses ask is: "How do ID scanners work?"
The answer is surprisingly simple. Modern ID scanners read the information encoded on a driver's license, state ID card, passport, or other government-issued identification document and instantly display the information for verification.
At Minor Decliner, we've helped thousands of businesses across North America implement ID scanning solutions for age verification, fake ID detection, visitor management, and compliance. In this guide, we'll explain exactly how ID scanners work and what happens when an ID is scanned.
What Does an ID Scanner Do?
An ID scanner is a device or software application that captures and reads information from an identification document.
Depending on the type of scanner and ID being scanned, the system may read:
- Driver's license barcode (PDF417 barcode)
- Mobile Driver's License (mDL)
- Passport MRZ (Machine Readable Zone)
- State-issued ID cards
Once scanned, the information is decoded and displayed in seconds.
Typical information includes:
- Full name
- Date of birth
- Age
- Address
- Driver's license number
- Expiration date
- State or issuing authority
- Gender
- Height and weight (when encoded)
The exact information displayed depends on the ID type and how the scanner is configured.
How Do ID Scanners Work?
Most driver's licenses in the United States contain a PDF417 barcode on the back of the card.
When an ID scanner reads this barcode, it:
Step 1: Captures the Barcode Image
Using a camera or laser imaging engine, the scanner captures an image of the barcode.
Step 2: Decodes the Data
The scanner software interprets the barcode and converts the encoded information into readable text.
Step 3: Validates the Format
Advanced systems verify that the barcode follows standards established by the:
- American Association of Motor Vehicle Administrators (AAMVA)
- State DMV specifications
Step 4: Displays the Results
The information appears on-screen almost instantly, allowing staff to verify the customer's age and identity.
Step 5: Optional Security Checks
More advanced systems can perform additional checks such as:
- Fake ID detection
- Expiration validation
- Duplicate scan alerts
- Mobile driver's license verification
- Watchlist and banned customer screening
What Comes Up When You Scan an ID?
Many business owners ask:
"What comes up when you scan an ID?"
The answer depends on the scanner's configuration and privacy settings.
Typical information displayed includes:
|
Information |
Available |
|
Full Name |
Yes |
|
Date of Birth |
Yes |
|
Age |
Yes |
|
Scan Time and Date |
Yes |
Many businesses choose to display only the information necessary for compliance and age verification.
For example, a bar may simply see:
- 24 Years Old
- Valid ID
- Expires 2028
- Scan Passed
while a security desk may require additional details.
How to Scan an ID
If you're wondering how to scan an ID, the process is straightforward.
For Driver's Licenses
- Open the scanning application.
- Position the barcode toward the scanner.
- Hold the ID steady.
- Wait for the confirmation beep.
- Review the information displayed.
Most modern scanners complete the process in less than one second.
How to Scan an Identification Card Correctly
To achieve the best results:
Ensure Good Lighting
Poor lighting can affect camera-based systems.
Scan the Barcode
For driver's licenses, the barcode is usually located on the back of the card.
Keep the ID Flat
Bent or damaged IDs can sometimes be difficult to read.
Use a Quality Scanner
Professional-grade scanners provide significantly better performance than generic smartphone scanning applications.
Can ID Scanners Detect Fake IDs?
Basic ID scanners simply read the barcode.
However, advanced systems can perform additional verification checks.
Professional fake ID detection solutions may analyze:
- Barcode integrity
- Data consistency
- DMV verification databases
- Mobile driver's license cryptographic validation
These systems help businesses identify counterfeit IDs that may appear legitimate to the human eye.
Do ID Scanners Store Information?
This depends entirely on how the system is configured.
Many businesses use ID scanners only for age verification and do not store personal information.
Others may retain information for:
- Compliance reporting
- Incident investigations
- Visitor management
- Security logs
- Access control
Businesses should always follow applicable privacy laws and regulations when storing identification data.
Industries That Use ID Scanners
Today, ID scanners are used in a wide variety of industries:
Hospitality
- Bars
- Nightclubs
- Restaurants
Retail
- Liquor stores
- Vape shops
- Tobacco retailers
- Cannabis dispensaries (where legal)
Security
- Corporate offices
- Warehouses
- Distribution centers
- Government facilities
Education
- Universities
- Student housing
- Campus events
Entertainment
- Concert venues
- Festivals
- Sports stadiums
- Casinos
Why Businesses Choose Minor Decliner
At Minor Decliner, we specialize in professional ID scanning, age verification, fake ID detection, and access control solutions.
Our systems provide:
- Unlimited standard ID scanning
- Fast barcode decoding
- Mobile driver's license (mDL) support
- Optional fake ID detection
- Compliance logging
- Visitor and access management
- Portable and fixed scanner options
Whether you're operating a neighborhood liquor store, a large entertainment venue, or a corporate security checkpoint, our solutions help businesses verify identity quickly and confidently.
Frequently Asked Questions
How do ID scanners work?
ID scanners capture information from a driver's license barcode, passport MRZ, or mobile driver's license and convert it into readable data for verification.
What does an ID scanner do?
An ID scanner reads, decodes, and displays identification information such as name, age, date of birth, and expiration date.
What comes up when you scan an ID?
Typically, the person's name, age, date of birth, appear on the screen.
How to scan an ID?
Position the barcode or identification document in front of the scanner, allow the device to capture the information, and review the displayed results.
How to scan an identification card?
Use a compatible ID scanner or scanning application, ensure the barcode or machine-readable area is visible, and follow the scanner's instructions.
Final Thoughts
Understanding how ID scanners work helps businesses make informed decisions about age verification, fraud prevention, and security. Modern ID scanners provide fast, accurate identification verification while helping organizations improve compliance and reduce risk.
If you're evaluating ID scanning solutions for your business, Minor Decliner's team of ID verification experts can help you select the right scanner, fake ID detection tools, and compliance features for your specific industry and requirements.
