App Drop-in
Integrations guide
Fourthline's App Drop-in lets you smoothly integrate workflows into your mobile app. It takes care of all interaction with the client, collects the relevant data (e.g. ID document, selfie, geolocation), and uploads it to Fourthline for case processing. You never handle sensitive personal data.
The SDK takes care of the user journey and orchestrates modules with a streamlined API flow. You can also easily level up from single products to multi-product solutions with no additional API requests.
All required images and data are captured in our best-practice UI and automatically uploaded to Fourthline for processing. You never handle sensitive personal data.
How it works
The App Drop-in supports the following:
Flow
The flow is as follows:
App Drop-in flow
User interface
Fourthline provides the mobile-responsive UI, which is built in line with industry-standard best practices for user experience (UX):
- The UI includes guidance and animations to help clients understand the journey.
- Clients may not know how to take photos with appropriate lighting, background, and framing, which can lead to processing delays or unnecessary rejections. The UI provides clients clear instructions and real-time feedback to optimize image quality and maximize conversion.
- The UI validates data entered by clients in real time to reduce input errors.
- You can localize the UI text in a range of languages, and customize fonts and colors to match the look-and-feel of your brand.
- Fourthline collects analytics data and continually updates the UI to improve conversion, meet evolving regulatory requirements, and keep pace with market trends in UIs and UX.
Videos
Explore the following example videos of our solutions and modules:
Identity Verification & modules
Identity Verification
Identity Verification
The European Identity Verification flow on the App Drop-in is as follows:
• Documents with a machine-readable zone (MRZ) are captured automatically without the client having to tap a Take photo button.
• The SDK provides selfie photo and liveness guidance, detecting the client's face (one face only) and ensuring it is within the frame.
Qualified Electronic Signature
Qualified Electronic Signature
The Qualified Electronic Signature module on the App Drop-in is as follows:
Bank Account Verification
Bank Account Verification
The Bank Account Verification module on the App Drop-in is as follows:
Document NFC
Document NFC
The Document NFC flow on the App Drop-in is as follows:
• It detects the chip and unlocks it using the ID document number and expiry date, and the client's birthdate (or the client details as a fallback).
• It extracts the data and the portrait.
Physical Proof of Address
Physical Proof of Address
The Physical Proof of Address module on the App Drop-in is as follows:
Tax number
Tax number
The Tax number module on the App Drop-in is as follows:
Client data
Client data
The SDK collects the client's personal data, address, and contact details in one module or separate modules:
Address and contact details
Market-specific solutions
Authentication solutions
Client Authentication
Client Authentication
The Client Authentication flow on the App Drop-in is as follows:
Document Authentication
Document Authentication
The Document Authentication flow on the App Drop-in is as follows:
Flow management
Permissions
Permissions
The App Drop-in asks for:
- Camera permissions to take document photos and video, and selfie photo and video
- Location permissions to access the client's geolocation and device metadata
Permissions are only requested once during the flow.
Camera permissions
Location permissions
If the client blocks permissions, the drop-in shows the following screens:
Blocked permissions
Warnings and errors
Warnings and errors
The following warnings and errors are possible:
| Type | Description |
|---|---|
| Bank Account Verification | • Bank Account Verification required to complete identity check • Client's bank declined the transfer • Klarna unavailable • Name not received from Klarna for matching • Payment failed due to technical error |
| Camera | • Camera stopped • Camera timed out |
| Client | Underage client |
| Device | • Device offline • Outdated software • Unsupported device |
| ID document | • Blurriness • Document condition insufficient • Document scan error • Document type must match the client's input • Expired document • Glare • Invalid data • Issuing country on ID document must match the client's input • Nationality must match the client's input • Photo of a screen or photocopy detected • Required side error • Unsupported document type, issuing country, or nationality |
| Location | • Blocked location service • Disabled location service |
| Network | • Blocked network request • Internet error • Network error • Server error |
| Permissions | • Blocked camera permissions • Blocked location permissions • Permissions error |
| Physical Proof of Address | • Camera roll access denied for file upload • Unsupported file type or size (JPG or PNG less than 10 MB) |
| Qualified Electronic Signature | • Approved document download failure • Fatal document approval error • Incomplete or failed Identity Verification • Location not supported • One-time passcode expired, was resent too many times, or too many attempts • Selfie not the same person as in associated Identity Verification case |
| Selfie | • Multiple faces detected • No face detected • No motion detected during liveness |
| SDK session | • Expired • Fatal error • Missing SDK validation code • Retryable error |
| Warnings | • Camera in use by another application • Position of face within selfie mask • Inconsistent data |
How to integrate
Configuration
For configuration and setup instructions, see the relevant manual:
Integration manuals
For step-by-step integration manuals per solution, see the relevant integration guide:
UI customization
For how to customize the UI, see App UI Customization.
Updated about 1 month ago