Machine-Readable Passports vs Biometric Passports: A Complete GuideDesign

Passports have become smarter, faster to check, and harder to forge, which is crucial as AI has made deception and fraud both more widespread and more sophisticated. With post-pandemic travel booming, it is essential for border security to not only make sure people are who they say they are, but to do so quickly. 

Two major innovations in passports have helped make this task easier. These are machine-readable passports, which let border systems scan passport details automatically, and biometric passports, which include an electronic chip that stores passport data and biometric information, such as a facial scan, for stronger identity checks. These are also known as e-passports and are now the most common type of passport worldwide. Let’s dive into the details.

What is a machine-readable passport?

A machine-readable passport is designed for both people and machines to read. It looks like a normal passport, but the bottom of the photo page usually has two lines of letters, numbers, and “<” symbols at the bottom. This simple code in the machine-readable zone makes it easier for machines to identify key details, like name, nationality, and date of birth.

Instead of a border officer typing in your details by hand, having a machine-readable passport means a scanner can read them automatically. For travelers, this means quicker checks at busy border crossings, such as airports.

How the MRZ code works

The code in the machine-readable zone (MRZ) can be found at the bottom of a passport’s identity page. MRZ provides information in a standardized, machine-optimized format that makes automated reading reliable and fast. A typical MRZ passport code includes the holder’s name, nationality, date of birth, passport number, issuing country, gender, and expiry date. It also includes check digits that work a little like a built-in spelling checker. If one number or letter has been changed, the system will spot that something does not match, indicating further investigation is needed.

The MRZ is one reason passport checks can happen so quickly for travelers. The scanner reads the code, extracts key details, and helps the border system verify that the document appears correct.

OCR and passport data fields

Optical character recognition (OCR) technology is a key component of passport infrastructure. It is used to scan passports and quickly extract the data fields required for border control, such as name, document number, date of birth, nationality, and expiration date.

OCR simply lets a machine automatically “read” the uniform printed text in the MRZ code. This means less manual typing and fewer errors, allowing faster border checks. This information is checked against databases to make sure the holder can pass through.

OCR allows a passport scanner to quickly read the important details from your passport, while the MRZ provides those details in a uniform, predictable format.

Suggested read: MRZ Code—How Does It Work? 

What is a biometric passport?

A biometric passport, also called an e-passport, contains a small electronic chip. It usually has a small gold symbol on the cover that looks like a camera, indicating that it can be read electronically at compatible border gates.

This type of passport stores passport details on a chip, along with biometric information, such as a digital passport photo for facial recognition. This can make checks faster at e-gates and harder for someone else to use a stolen or fake passport. Biometric passports address a long-standing issue of forgery.

Inside the embedded biometric chip

The chips in biometric passports are usually hidden inside the passport cover or data page. When the passport is placed on a scanner, the system can read the chip and compare the information it contains with the printed details or additional biometric checks.

These chips mean the passports can be used to pass information contactlessly via NFC (near-field communication) devices, such as a phone. This is the same general idea behind contactless cards or tapping a phone to pay, and allows the information in the passport to be read when held close to a compatible reader. 

In essence, the chip provides border systems with another way to verify that a passport is genuine and has not been tampered with.

Biometric data stored on your passport

Chips in e-passports contain biometric data, which is personal information based on your physical features. Common examples include a digital image of your face, your fingerprints, or a scan of your iris for facial, fingerprint, or iris recognition, respectively. 

This makes it easier to make sure travelers are who they claim to be at the border. At an e-gate, for example, a camera may compare your live face to the photo stored on the chip, allowing quick verification.

Machine-readable passports vs biometric passports: How do they work?

These two types of passports work in similar but not identical ways. A machine-readable passport enables scanners to quickly read the printed information in the MRZ. An e-passport, or biometric passport, does this too, but also lets the scanner read information from an electronic chip. All biometric passports are machine-readable passports, but some machine-readable passports may not contain biometric information.

Reading the MRZ at border control

When a machine-readable passport is checked at border control, the scanner uses OCR technology to read the MRZ at the bottom of the passport photo page. This is the two-line code made up of letters, numbers, and “<” symbols. 

This code is uniform to allow border infrastructure around the world to process the information. When the OCR technology scans the passport, the system easily captures key details.

This means the officer does not need to type your information by hand, avoiding potential human error. The scanner reads the passport, and the officer can focus on confirming whether everything looks correct.

How e-passport gates verify travelers

A passport check at an e-gate can make things even easier for travelers. At a typical automated border gate, you usually place your biometric passport on a reader, look into a camera, and wait while the system checks the passport and your face. There may be additional biometric checks, such as fingerprint scans.

The gate checks whether the passport can be read, whether the person at the gate appears to match the passport holder, and whether they are authorized to enter. If there are any issues with passport verification, a border officer can manually check the passport.

Are MRZ-only passports still valid?

Some passports are machine-readable (MRZ) but do not contain a biometric chip. These MRZ-only passports may still be valid if they have not expired, but their acceptance depends on the destination and travel conditions. EU countries generally no longer issue non-biometric passports and rely on biometric e-passports as the standard, yet MRZ-only passports may still be accepted in some cases. However, they may limit access to visa-free travel or automated border controls.

Travelers should check whether their destination requires an e-passport. Even if these passports are valid, they cannot be used at e-gates. Non-machine-readable passports, meanwhile, have been phased out by the ICAO since 2015, though previously issued documents remained valid until their expiration.

The US Visa Waiver Program

Programs like the US Visa Waiver Program (VWP) show why passport type is important. The US VWP allows citizens of 42 participating countries and territories to travel to the United States for tourism or business for up to 90 days without a visa, provided they have valid Electronic System for Travel Authorization, or ESTA, approval and meet the program’s eligibility requirements.

One of those requirements is having an e-passport. A valid MRZ-only passport is not enough for VWP travel. If your passport does not have the e-passport symbol on the cover, you may need to renew it or apply for a visa before traveling to the United States.

Key benefits of biometric passports

The main benefit of a biometric passport is that it gives border systems more ways to check that a passport belongs to the person using it. An e-passport still has the printed passport page and MRZ code, but it also includes a chip that stores passport and biometric data.

For travelers, this means stronger protections from fraud and smoother processing at border crossings. It does not necessarily make every border-crossing automatic, but it can help border officers and e-gates confirm identity quickly with an additional layer of anti-fraud verification.

Anti-fraud and identity theft protection

Passport fraud is a serious issue, with Interpol finding over 200,000 instances of stolen passports being used in 2023. Recent advances in AI are also helping fraudsters make forged documents more convincing for very little money. 

Biometric passports, however, help reduce passport fraud because the printed passport details can be compared with the data stored on the passport’s secure chip. That chip is digitally signed and cryptographically protected, making it extremely difficult to clone or alter. If someone alters the printed page, changes the photo, or tries to use a document that does not match them, the issue can be flagged.

This makes identity verification stronger. Instead of only checking the passport number and photo by eye, a border system can compare the traveler’s live face with the biometric digital image stored in the passport chip. This makes it harder for someone to use a stolen, borrowed, or altered passport successfully, and potentially makes travelers’ passports less desirable to thieves.

Faster border crossings with e-gates

Biometric passports can also speed border checks, especially at airports with automated gates, where the traveler scans the passport, looks into a camera, and waits while the system compares the chip’s biometric data with their face. 

In the UK, more than 270 eGates operate across 15 air and rail ports, making e-passport gate checks easier to process large volumes of low-risk passengers more quickly than staffed desks. This reduces friction for legitimate travelers and allows officers to focus on higher-risk cases.

Suggested read: Italy to Phase Out Traditional Identity Cards for Biometric eIDs by August 2026

Passport security features you should know

Modern passports use a range of security features to make them harder to copy or misuse. Some of these are easy to see, such as holograms. Others are hidden, such as the information held in a passport’s biometric chip.

Visible security elements on the page

Visible passport security features include:

• Fluorescence that reacts under UV light
• Watermarks
• Ink that feels raised
• Printed patterns that are difficult to copy
• The code in the machine-readable zone

These features help trained officers and scanning systems spot signs of tampering or forgery.

Hidden and electronic security layers

The biometric chip in your passport adds another hidden layer of protection that can be transferred to a device through NFC technology. The chip stores a digital copy of the information on the passport as well as biometric details, such as a digital photograph and fingerprint scans. 

This makes it harder to fake a passport. If someone changes a passport’s printed page but not the chip, or tries to use a passport that does not match their face, systems can flag the issue for manual review.

Biometric identifiers used in passports

Passports use biometric identifiers to help verify identity, but what exactly is biometric data? 

Biometric data is information associated with a person’s physical features. It is a way of using your body’s unique characteristics, like your face, fingerprint, or iris, to help verify your identity.

Not every passport stores the same types of biometric data. Most biometric passports include a digital facial image, while some countries may also include fingerprint or iris data.

Facial recognition

The digital image of your face in your passport makes facial recognition checks possible. At a border crossing, a camera can compare your face with the passport photo stored on the chip.

This is one of the most common forms of identity verification at airports and is used in e-gates.

Fingerprints and iris scans

Depending on the issuing country, passports may also store fingerprint data on the chip or use fingerprints as part of the passport application and border-check process. Fingerprints can help confirm identity because they are difficult to fake and remain consistent throughout a person’s life.

Passports can also include an iris scan, which shows the highly individual pattern in the colored part of the eye. However, facial images remain the most common biometric used in passports.

ICAO standards for modern passports

The International Civil Aviation Organization (ICAO) has set out passport standards for uniform machine-readable travel documents since 1968 to accelerate passenger clearance through passport control. 

These standards help make sure that a passport issued in one country can be read and checked by border systems in another. This is why passport checks feel broadly similar in many airports, as the layout, MRZ, security features, and e-passport chip rules follow common guidance. 

More specifically, much of this is to do with ICAO’s Document 9303, which covers machine-readable travel documents, including machine-readable passports and e-passports.

ICAO Document 9303 explained

ICAO Document 9303 sets the standard design for machine-readable travel documents. It is adhered to by 193 member states worldwide and explains how passports should be designed so that both people and machines can read them.

For example, it specifies the formats for MRZ code and the information required in biometric passports. ICAO-compliant biometric passports must contain information for facial recognition checks, with fingerprint and iris recognition optional.

It also specifies the design of the gold camera-like symbol that indicates whether a passport is biometric or not. 

This makes it easier for a traveler’s passport to be accepted by scanners, e-gates, airlines, and border systems all around the world, and you benefit from it every time your passport is scanned at check-in, security, or passport control.

The most secure passport types today

Biometric passports are the most secure type of passport. These combine the benefits of anti-tampering physical security features, the MRZ, and the embedded biometric chip. That makes them harder to forge or alter than older passports that rely only on printed information. 

Strongest passports by mobility score

In travel terms, however, the strongest passports are those that give their holders visa-free or visa-on-arrival access to the largest number of destinations. This is called a mobility score.

According to the 2026 Henley Passport Index, the Singaporean passport is currently the strongest passport in the world, which allows the holder to visit 192 destinations visa-free. This is followed by Japan, South Korea, and the United Arab Emirates, tied for second place with 187 destinations.

Henley’s index ranks 199 passports against 227 travel destinations, using data from the International Air Transport Association (IATA).

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Countries that issue biometric passports

Most countries now issue biometric passports as standard. They are the typical passport format in most parts of the world, and even countries that are not yet issuing them have plans to do so.

Adoption timeline across the globe

Malaysia is widely credited as the first country to issue biometric passports in 1998, though early versions did not match the later ICAO-compliant e-passport model used today.

Adoption accelerated in the 2000s as governments upgraded from machine-readable passports to biometric documents. According to ICAO, more than 140 states and non-state entities issue e-passports, with more than 1 billion already in circulation worldwide.

How to check if you have a biometric passport

If you are wondering whether your passport is biometric, the easiest way to check is to look at the front cover. 

A biometric passport usually has a small gold symbol near the bottom, shaped like a tiny camera or a rectangle with a circle inside it. This symbol means the passport has an electronic chip inside and can be read by compatible passport scanners.

If your passport has this ‘e-passport symbol’, it is biometric. If it only has the machine-readable lines on the identity page but no chip symbol on the cover, it may be machine-readable but not biometric.

Another way to know whether your passport is biometric is to check when and where it was issued. Most countries now issue biometric passports as standard, especially for newer passports.

Future of travel documents and digital ID

While the future of travel documents is becoming more digital, the physical passport is not going anywhere anytime soon. One major development is the Digital Travel Credential, or digital passport, which is a secure digital version of passport data that can be stored on a digital device like a phone. 

The European Commission has also proposed an EU Digital Travel app that would let travelers create and store digital travel credentials on a smartphone for identity verification.

Instead of showing the same document at check-in, bag drop, security, boarding, and passport control, travelers may eventually be able to share verified identity details in advance and use their face or another biometric check at different airport touchpoints. 

However, airlines, airports, and border agencies do not always need the same data. A border officer may need full passport details, while an airline may only need basic information such as name, date of birth, and nationality. This is why IATA says systems should be in place for travelers to share only the details required for each check.

Mobile driving licenses and digital IDs

Mobile driving licenses and digital IDs are undergoing similar changes to passports, letting people store verified identity documents on a smartphone and share selected details when they need to prove who they are. 

Digital identity verification is already happening in travel. India’s Digi Yatra program, for instance, lets domestic passengers use facial recognition linked to a verified digital ID at participating airports.

Digital identity verification could mean fewer document checks, shorter queues, and more control over what personal data is shared. But it depends on where they are traveling and which systems are accepted. A mobile ID may help with some domestic travel, age checks, or online services, but it is not yet a replacement for a passport at international borders. 

FAQ: Machine-readable and biometric passports

• What does “biometric passport” mean?

  A biometric passport is a travel document that contains an embedded electronic chip storing the holder’s personal details and biometric data. This usually includes a digital facial image, and in some cases fingerprints or iris data, which help verify the holder’s identity more securely.

• What is an e-passport?

  An e-passport (electronic passport) is another term for a biometric passport. It refers to a traditional passport enhanced with a microchip that stores biometric and identity data, enabling faster and more secure identity verification at border controls.

• How do I know if my passport is biometric?

  To find out if your passport is biometric, look for the small gold camera-like e-passport symbol on the front cover. If you see one, you have a biometric passport.

• What is the MRZ code on a passport?

  The MRZ code is the code in the “machine-readable zone” at the bottom of your passport identity page. Your passport’s MRZ code contains key details like your name, passport number, nationality, date of birth, and document expiry date in a format that scanners can read quickly.

• Are all US passports biometric?

  All US passports are now biometric. The US Department of State has issued only biometric passport books since August 2007.

• What is the strongest passport in the world?

  According to the 2026 Henley Passport Index, the strongest passport in the world is Singapore, with visa-free access to 192 destinations. The world’s strongest passport is measured by how many destinations its holders can visit without applying for a visa in advance.