How Does Identity Verification Work in Aviation?

At some airports, a passenger can clear several checkpoints without taking a passport out of their bag. The passport may still be doing much of the identity work behind the scenes.

Facial recognition can carry a verified identity from one checkpoint to the next, while mobile IDs and Digital Travel Credentials let travelers present a phone-held credential in place of a physical document. Behind that convenience, document data, RFID chip verification, biometrics, and government-record checks still establish whether the passenger and credential can be trusted.

Here’s how those layers work together from online check-in to boarding.

Identity verification in aviation is a series of decisions made by different organizations before and during a trip.

Before departure, an airline checks whether the passenger has the documents required for the route and destination. Once the passenger reaches the airport, the airline or responsible authority may also need to confirm that the person checking in or boarding matches the reservation and travel documents. The border authority makes its own decision about entry or exit.

On international routes, airlines may also collect Advance Passenger Information from the passenger’s travel document and send the required data to government authorities before departure or arrival.

The same passport, portrait, or digital credential can support several of these steps. Each organization still needs to know where the evidence came from, which checks were completed, whether the result remains valid, and whether it provides enough assurance for the decision at hand.

Depending on the program, a travel document may be checked remotely, in person, or both. A successful remote check may allow the passenger to continue through selected airport checkpoints without presenting the physical passport again. In-person readers provide an additional check whenever route rules, risk signals, or verification results call for one.

During online check-in, document verification software embedded in an app can:

• Identify the document type

• Extract data from the visual inspection zone using OCR

• Read the machine-readable zone (MRZ) and barcode

• Validate MRZ check digits 

• Compare repeated fields such as the document number, name, date of birth, and expiration date across the VIZ, MRZ, and barcode

If the passenger has an ePassport and an NFC-enabled phone, the app can also read and verify the data stored on the passport’s chip via NFC. The chip stores identity data and the holder’s portrait, and the issuing authority protects that data with a digital signature. 

Passive authentication verifies the issuing authority’s digital signature and confirms that the signed chip data has not been altered. Where supported, active or chip authentication can additionally help determine whether the chip itself is genuine rather than a clone.

The airline can then combine the document verification result with other authorized fraud indicators, such as inconsistent passenger data, repeated failed verification attempts, or signs of image manipulation. Passengers whose checks are complete and raise no concerns may continue automatically, while incomplete, inconsistent, or higher-risk cases can be sent for an in-person check.

At the airport, staff may use a dedicated document reader to repeat or supplement the remote checks under controlled conditions. A device such as Regula 70X4M can also examine physical security features under white, infrared, ultraviolet, and other light sources — checks that a standard phone camera cannot reproduce to the same degree.

In either setting, readable data alone doesn’t establish authenticity. The verification process also needs to determine whether the information agrees across the document, whether the RFID chip is genuine, and whether the document is still valid for the trip.

Many major airports now use face biometrics to verify travelers at multiple checkpoints — from check-in and bag drop to security screening and boarding.

Face biometrics can link the traveler to an identity document or to an identity established earlier in the process:

• In a typical 1:1 face verification, the system compares a live image with the portrait from a passport, an RFID chip, or an approved record. 

• A 1:N face identification searches for the person among many records; for example, an international wanted persons list.

The environment changes how these checks need to be protected.

At a supervised e-gate, counter, or boarding point, airport staff can see the traveler and the organization controls the camera. This reduces the risk of screen replays and other presentation attacks at on-site checkpoints. At the same time, remote check-in is more exposed because the organization has less control over the passenger’s device or capture environment.

Remote check-in is different because no member of staff controls the passenger’s phone or surroundings. Liveness checks can therefore be used to establish that the camera is capturing a person who is physically present, rather than a photograph, screen replay, or prerecorded video.

Regula Face SDK supports 1:1 face verification, 1:N identification, image-quality assessment, and active or passive liveness checks. This allows the biometric step to be adapted to remote enrollment as well as controlled airport checkpoints.

Digital credentials such as mobile driver’s licenses (mDLs) are issued for ongoing use, independently of any travel plans. At a participating checkpoint, the traveler presents the credential through a wallet app. The receiving system verifies the issuer’s digital signature and the credential’s validity, using the identity data required for that check.

For example, in the United States, the TSA accepts eligible mDLs and other digital IDs at participating security checkpoints. Travelers can present their phone in place of a physical ID for that check, although they still need to carry an acceptable physical ID as a backup.

For international travel, Digital Travel Credentials (DTCs) serve a different purpose: they allow passport identity data to be shared and authenticated digitally. Depending on the DTC type, an existing ePassport or a physical component on a device authenticates the credential.

ICAO defines three DTC types:

• Type 1: A virtual component (DTC-VC) is derived from an existing ePassport. The ePassport remains the physical authenticator and must still be carried.

• Type 2: The issuing authority provides a virtual component and cryptographically links it to a device-based physical component (DTC-PC). The associated ePassport remains available as an alternative or fallback and should still be carried.

• Type 3: The issuing authority provides a virtual component and a device-based physical component, with no associated ePassport.

These credentials can reduce repeated physical document checks where the airline or authority accepts them. Each organization still determines whether the credential provides the evidence required for its decision.

Regula Document Reader SDK supports ICAO-aligned DTC processing, including the creation and verification of virtual components derived from ePassport chips.

When automated checks cannot produce a confident result, the document can be referred to second-line inspection. Trained officers then determine why the visible data, RFID chip, physical security features, or biometric evidence do not agree.

And the need for this process does not disappear, even as travel becomes more digital. Type 1 and Type 2 DTCs remain connected to physical documents, and the acceptance of digital credentials is still uneven, to say the least.

That’s why airports set up entire document checking stations with large-scale spectral comparators — with such arsenal, identity fraud becomes very difficult.

At Wattay International Airport, Lao immigration authorities worked with the International Organization for Migration and the Australian Department of Home Affairs to deploy a Regula 4306 Video Spectral Comparator.

Instead of relying primarily on manual visual inspection, second-line officers can now compare a questioned document with reference samples, reveal alterations under different light sources and magnification, examine surface relief and ink properties, and create a documented examination report. 

The project also included practical training, helping the authorities make second-line checks less dependent on individual judgment.

At some airport checkpoints, yes. The passport’s role often moves earlier in the process: its data and chip are verified during registration or before travel, and the traveler then scans their face or digital credential at later touchpoints.

For example, at Singapore’s Changi and Seletar airports, 127 million travelers cleared immigration using only facial and iris biometrics in 2025. At the same time, all foreign visitors arriving in Singapore have been able to use automated lanes without prior enrollment since May 2024.

Meanwhile, IATA’s One ID is also working on a passportless solution, with passengers sharing trusted identity and travel credentials before arriving. 

In April 2026, IATA reported successful proofs of concept involving multiple airlines, airports, wallet providers, and national identity programs. The trials showed that technical interoperability is achievable, and they also identified the next dependency: governments need to issue and accept DTCs at scale.

Aviation identity systems cross organizational and national boundaries, so that technical compatibility alone cannot make them work. 

Airlines, airports, technology providers, and governments also need agreement on who issued the credential, who may process the data, which checks are required, and how long the resulting records may be kept.

Aviation puts identity verification systems under unusual pressure. They have to process high passenger volumes, recognize documents from around the world, connect with airline and government infrastructure, and return reliable results quickly.

Regula brings experience from both sides of the process. More than 80 borders worldwide are equipped with Regula technology, and the company has cooperated with INTERPOL since 2004 on document databases, information exchange, and training for law-enforcement and border-control specialists.

The same experience extends to passenger-facing systems. AirAsia, Wizz Air, Pegasus Airlines, and Checkport Switzerland use Regula technology for mobile check-in, passenger enrollment, document capture, and travel-document validation.

Regula can support the full process described in this article: Regula Document Reader SDK for remote and in-person document checks, Regula Face SDK for biometric verification, document readers for controlled first-line inspection, and forensic equipment for second-line examination.

On top of that, Regula IDV Platform can bring together results from these SDKs and connected equipment, including document readers and kiosks, and coordinate checks and review through configurable workflows. An on-premises deployment allows identity processing and storage to remain within infrastructure controlled by the airline, airport, or relevant authority.

If you’re planning a new aviation identity workflow or updating an existing one, talk to Regula about your project. We can help determine which checks belong before travel, which cases require airport equipment, and how exceptions should be routed.