Identity Verification
Onboard clients with a hyper-accurate verification solution that's built for conversion.
Identity Verification
Onboard clients with a hyper-accurate verification solution that's built for conversion.
![](data:image/svg+xml,<svg display="block" role="presentation" viewBox="0 0 56 56" xmlns="http://www.w3.org/2000/svg"><g d="M 0 0 L 48 0 L 48 48 L 0 48 Z M 23.675 43.125 C 27.665 43.125 30.9 40.081 30.9 36.326 C 30.9 32.57 27.665 29.525 23.675 29.525 C 19.685 29.525 16.45 32.57 16.45 36.326 C 16.45 40.081 19.685 43.126 23.675 43.126 Z M 10.5 21.876 L 10.5 21.215 C 10.5 16.882 11.933 12.725 14.483 9.661 C 17.033 6.598 20.493 4.876 24.1 4.876 C 27.707 4.876 31.166 6.598 33.716 9.661 C 36.267 12.726 37.7 16.882 37.7 21.215 L 37.7 21.876 Z M 10.5 21.876 L 37.7 21.876 L 37.7 26.909 L 10.5 26.909 Z M 24.1 9.975 L 44.711 34.837 L 3.489 34.837 Z M 22.195 23.261 L 25.715 23.261 L 26.24 8.9 L 21.67 8.9 Z M 23.955 30.983 C 25.438 30.983 26.673 29.87 26.673 28.326 C 26.673 26.751 25.438 25.67 23.955 25.67 C 22.441 25.67 21.237 26.751 21.237 28.326 C 21.237 29.871 22.441 30.983 23.955 30.983 Z" fill="transparent" height="48px" id="kK8J7qMsr" transform="translate(4 4)" width="48px"><path d="M 0 0 L 48 0 L 48 48 L 0 48 Z" fill="transparent" height="48px" id="IPMrxXGy4" width="48px"/><path d="M 7.225 13.6 C 11.215 13.6 14.449 10.555 14.449 6.8 C 14.449 3.044 11.215 0 7.225 0 C 3.235 0 0 3.045 0 6.8 C 0 10.555 3.235 13.6 7.225 13.6 Z" fill="rgb(9, 62, 60)" height="13.600499999999897px" id="Fj4fD7nkO" transform="translate(16.45 29.525)" width="14.449499999999944px"/><path d="M 0 17 L 0 16.339 C 0 12.005 1.433 7.849 3.983 4.785 C 6.533 1.721 9.993 0 13.6 0 C 17.207 0 20.666 1.721 23.216 4.785 C 25.767 7.85 27.2 12.005 27.2 16.339 L 27.2 17 Z M 0 17 L 27.2 17 L 27.2 22.033 L 0 22.033 Z" fill="rgb(0, 204, 122)" height="22.032750274658156px" id="UEwLZZ3h5" transform="translate(10.5 4.876)" width="27.200249999999983px"/><path d="M 20.612 0 L 41.222 24.862 L 0 24.862 Z" fill="rgb(0, 204, 122)" height="24.862499999999955px" id="nYlvdbc2Z" transform="translate(3.489 9.975)" width="41.222250000000145px"/><path d="M 0.958 14.361 L 4.478 14.361 L 5.003 0 L 0.433 0 Z M 2.718 22.082 C 4.201 22.082 5.436 20.97 5.436 19.426 C 5.436 17.851 4.201 16.77 2.718 16.77 C 1.205 16.77 0 17.851 0 19.426 C 0 20.971 1.205 22.082 2.718 22.082 Z" fill="rgb(9, 62, 60)" height="22.082252365112254px" id="Guca5E9JS" transform="translate(21.237 8.9)" width="5.436000011329384px"/></g></svg>)
The problem
You need to onboard clients as securely, quickly, and seamlessly as possible, but are up against extensive regulatory requirements.
![](data:image/svg+xml,<svg display="block" role="presentation" viewBox="0 0 56 56" xmlns="http://www.w3.org/2000/svg"><g d="M 37.45 6.455 L 24.176 19.84 L 19.254 14.873 L 13.649 20.528 L 24.176 31.158 L 43.055 12.11 Z M 10.351 14.432 C 12.769 14.432 14.73 12.453 14.73 10.013 C 14.73 7.573 12.769 5.595 10.351 5.595 C 7.932 5.595 5.972 7.573 5.972 10.013 C 5.972 12.453 7.932 14.432 10.351 14.432 Z M 4.777 29.007 C 7.416 29.007 9.555 26.849 9.555 24.186 C 9.555 21.524 7.416 19.366 4.777 19.366 C 2.139 19.366 0 21.524 0 24.186 C 0 26.849 2.139 29.007 4.777 29.007 Z M 10.351 41.975 C 12.769 41.975 14.73 39.997 14.73 37.556 C 14.73 35.116 12.769 33.138 10.351 33.138 C 7.932 33.138 5.972 35.116 5.972 37.556 C 5.972 39.997 7.932 41.975 10.351 41.975 Z M 24 48 C 26.419 48 28.379 46.022 28.379 43.582 C 28.379 41.141 26.419 39.163 24 39.163 C 21.581 39.163 19.621 41.141 19.621 43.582 C 19.621 46.022 21.581 48 24 48 Z M 24 8.837 C 26.419 8.837 28.379 6.859 28.379 4.418 C 28.379 1.978 26.419 0 24 0 C 21.581 0 19.621 1.978 19.621 4.418 C 19.621 6.859 21.581 8.837 24 8.837 Z M 43.621 28.203 C 46.039 28.203 48 26.225 48 23.785 C 48 21.345 46.039 19.366 43.621 19.366 C 41.202 19.366 39.242 21.345 39.242 23.785 C 39.242 26.225 41.202 28.203 43.621 28.203 Z M 37.649 41.975 C 40.068 41.975 42.028 39.997 42.028 37.556 C 42.028 35.116 40.068 33.138 37.649 33.138 C 35.231 33.138 33.27 35.116 33.27 37.556 C 33.27 39.997 35.231 41.975 37.649 41.975 Z" fill="transparent" height="47.999997573916374px" id="SJwZSp1qk" transform="translate(4 4)" width="48.00000068700706px"><path d="M 23.801 0 L 10.527 13.384 L 5.605 8.418 L 0 14.073 L 10.527 24.703 L 29.406 5.655 Z" fill="rgb(36, 36, 102)" height="24.702928955798654px" id="obVFHmpc7" transform="translate(13.649 6.455)" width="29.405687172153193px"/><path d="M 4.379 8.837 C 6.798 8.837 8.758 6.859 8.758 4.418 C 8.758 1.978 6.798 0 4.379 0 C 1.961 0 0 1.978 0 4.418 C 0 6.859 1.961 8.837 4.379 8.837 Z" fill="rgb(0, 204, 122)" height="8.836820157786999px" id="tbO84DI5i" transform="translate(5.972 5.595)" width="8.758293838862755px"/><path d="M 4.777 9.64 C 7.416 9.64 9.555 7.482 9.555 4.82 C 9.555 2.158 7.416 0 4.777 0 C 2.139 0 0 2.158 0 4.82 C 0 7.482 2.139 9.64 4.777 9.64 Z" fill="rgb(0, 204, 122)" height="9.640167364016726px" id="yvMcD_ALk" transform="translate(0 19.366)" width="9.554502369668171px"/><path d="M 4.379 8.837 C 6.798 8.837 8.758 6.859 8.758 4.418 C 8.758 1.978 6.798 0 4.379 0 C 1.961 0 0 1.978 0 4.418 C 0 6.859 1.961 8.837 4.379 8.837 Z" fill="rgb(0, 204, 122)" height="8.836820083682px" id="NEu0TGsZG" transform="translate(5.972 33.138)" width="8.758293838862755px"/><path d="M 4.379 8.837 C 6.798 8.837 8.758 6.859 8.758 4.418 C 8.758 1.978 6.798 0 4.379 0 C 1.961 0 0 1.978 0 4.418 C 0 6.859 1.961 8.837 4.379 8.837 Z" fill="rgb(0, 204, 122)" height="8.836820083682px" id="W72NOONhJ" transform="translate(19.621 39.163)" width="8.7582938388623px"/><path d="M 4.379 8.837 C 6.798 8.837 8.758 6.859 8.758 4.418 C 8.758 1.978 6.798 0 4.379 0 C 1.961 0 0 1.978 0 4.418 C 0 6.859 1.961 8.837 4.379 8.837 Z" fill="rgb(0, 204, 122)" height="8.836820083681998px" id="wdJDLdRZx" transform="translate(19.621 0)" width="8.7582938388623px"/><path d="M 4.379 8.837 C 6.798 8.837 8.758 6.859 8.758 4.418 C 8.758 1.978 6.798 0 4.379 0 C 1.961 0 0 1.978 0 4.418 C 0 6.859 1.961 8.837 4.379 8.837 Z" fill="rgb(0, 204, 122)" height="8.836820083681996px" id="blQyWYkME" transform="translate(39.242 19.366)" width="8.758293838862528px"/><path d="M 4.379 8.837 C 6.798 8.837 8.758 6.859 8.758 4.418 C 8.758 1.978 6.798 0 4.379 0 C 1.961 0 0 1.978 0 4.418 C 0 6.859 1.961 8.837 4.379 8.837 Z" fill="rgb(0, 204, 122)" height="8.836820083682px" id="vda_wNRgt" transform="translate(33.27 33.138)" width="8.758293838862528px"/></g></svg>)
Our solution
We offer a proprietary solution with bank-grade identification and verification, decreasing friction for your clients.
![](data:image/svg+xml,<svg display="block" role="presentation" viewBox="0 0 56 56" xmlns="http://www.w3.org/2000/svg"><path d="M 29.663 0 L 9.74 0 C 4.361 0 0 3.838 0 8.571 C 0 13.305 4.361 17.143 9.74 17.143 L 29.663 17.143 C 35.042 17.143 39.403 13.305 39.403 8.571 C 39.403 3.838 35.042 0 29.663 0 Z" fill="rgb(188, 255, 138)" height="17.142857142857146px" id="FHuHBbRwU" transform="translate(8 30.857)" width="39.40298507462694px"/><path d="M 0 0 L 19.701 22.857 L 39.403 0 Z" fill="rgb(77, 85, 235)" height="22.857142857142854px" id="A4SxBwItk" transform="translate(8.597 8)" width="39.40298507462694px"/></svg>)
Applications
Automated onboarding and GDPR-proof biometric verification.
The problem
You need to onboard clients as securely, quickly, and seamlessly as possible, but are up against extensive regulatory requirements.
Our solution
We offer a proprietary solution with bank-grade identification and verification, decreasing friction for your clients.
Applications
Automated onboarding and GDPR-proof biometric verification.
Anti-fraud, pro conversion
3500+
Document types
185
Countries
60s
Response time
90%
Automatic decision-making
99.98%
Fraud detection accuracy
100%
GDPR compliant
Anti-fraud, pro conversion
3500+
Document types
185
Countries
60s
Response time
90%
Automatic decision-making
Go beyond a simple selfie and document check
Fourthline performs deep analysis on every identity verification, checking for authenticity, security features, liveness, and more. Over 210 checks are performed on every document and selfie, resulting in the highest level of fraud detection accuracy compared to other identity verification service providers and identity verification software.
90% of checks are performed automatically in the background in real time, ensuring a state-of-the-art user experience. The user is provided with live feedback during the onboarding process, improving first-try conversion rates.
Go beyond a simple selfie and document check
Fourthline performs deep analysis on every identity verification, checking for authenticity, security features, liveness, and more. Over 210 checks are performed on every document and selfie, resulting in the highest level of fraud detection accuracy compared to other identity verification service providers and identity verification software.
90% of checks are performed automatically in the background in real time, ensuring a state-of-the-art user experience. The user is provided with live feedback during the onboarding process, improving first-try conversion rates.
How it works
How it works
1. Your client submits their ID document photo
![](data:image/svg+xml,<svg display="block" role="presentation" viewBox="0 0 56 56" xmlns="http://www.w3.org/2000/svg"><g d="M 0 0 L 45 0 L 45 45 L 0 45 Z M 3.516 22.5 C 3.516 12.015 12.015 3.516 22.5 3.516 C 32.985 3.516 41.484 12.015 41.484 22.5 C 41.484 32.985 32.985 41.484 22.5 41.484 C 12.015 41.484 3.516 32.985 3.516 22.5 Z M 9.844 23.374 L 12.827 20.391 L 21.776 29.34 L 18.792 32.323 Z M 35.768 15.64 L 32.785 12.656 L 15.971 29.47 L 18.954 32.453 Z" fill="transparent" height="45px" id="YGXvX_Pwo" transform="translate(5 5)" width="45px"><path d="M 0 0 L 45 0 L 45 45 L 0 45 Z" fill="transparent" height="45px" id="CCZPAyDf5" width="45px"/><path d="M 0 18.984 C 0 8.5 8.5 0 18.984 0 C 29.469 0 37.969 8.5 37.969 18.984 C 37.969 29.469 29.469 37.969 18.984 37.969 C 8.5 37.969 0 29.469 0 18.984 Z" fill="rgb(0, 204, 122)" height="37.96875px" id="L2Q21evpr" transform="translate(3.516 3.516)" width="37.96875px"/><path d="M 0 2.983 L 2.983 0 L 11.932 8.949 L 8.949 11.933 Z" fill="rgb(255, 255, 255)" height="11.932734374998866px" id="Rk_5PgmlI" transform="translate(9.844 20.391)" width="11.932031250000819px"/><path d="M 19.797 2.983 L 16.814 0 L 0 16.814 L 2.983 19.797 Z" fill="rgb(255, 255, 255)" height="19.79718749999909px" id="xdpOxNp1V" transform="translate(15.971 12.656)" width="19.797187499999836px"/></g></svg>)
Automatic data extraction from the Visual Inspection and Machine Readable zone
Proprietary OCR algorithms
Automated hologram and microprint verification, as well as other localised security features
Tampering, counterfeit, and paper copy detection
Real-time feedback to improve photo quality
2. Your client submits selfie and liveness video
3. Optionally, your client scans their ID with NFC
1. Your client submits their ID document photo
2. Your client submits selfie and liveness video
3. Optionally, your client scans their ID with NFC
Seamless integration
Integrate mobile and web SDKs within weeks:
Customisable branding and workflows with choice of brand colors, fonts, logos, and more
Available for iOS, Android and web browsers through our web SDK
Seamless UX and onboarding flow built for UX and conversion
Localisation and configurations in up to eight languages
Seamless integration
Integrate mobile and web SDKs within weeks:
Customisable branding and workflows with choice of brand colors, fonts, logos, and more
Available for iOS, Android and web browsers through our web SDK
Seamless UX and onboarding flow built for UX and conversion
Localisation and configurations in up to eight languages
“Rather than relying on off-the-shelf software, we build our algorithms from scratch and train them directly on data within our domain.”
Sebastian Vater | VP of ML Research - Fourthline
“Rather than relying on off-the-shelf software, we build our algorithms from scratch and train them directly on data within our domain.”
Sebastian Vater | VP of ML Research - Fourthline
Want to learn more?
Discover how we can help you solve mission-critical identity challenges in a tailored way.
Want to learn more?
Discover how we can help you solve mission-critical identity challenges in a tailored way.
Solutions
Solutions
Fourthline has been certified by EY CertifyPoint to ISO/IEC27001:2022 with certification number 2021-039.
Copyright © 2026 - Fourthline B.V. - All rights reserved.
Fourthline has been certified by EY CertifyPoint to ISO/IEC27001:2022 with certification number 2021-039.
Copyright © 2026 - Fourthline B.V. - All rights reserved.