AUTHADA Online Identifizieren is a mobile app-based digital identity verification service for end users in Germany and the EU. It enables individuals to verify their identity online using the German national ID card (Personalausweis), a residence permit (Aufenthaltstitel), or the eID card for EU/EEA citizens, without needing to visit a physical location. The verification process works as follows: 1. The user opens the AUTHADA app and scans a QR code or enters an ident code provided by a service provider's website. 2. The user enters their ID card PIN and holds their ID document against the smartphone's NFC interface to read the chip data. 3. The app generates a TAN (transaction authentication number) that the user enters on the service provider's website to complete verification. The app is available for Android (Google Play), iOS (App Store), and Huawei devices (AppGallery). It requires an NFC-enabled smartphone. Use cases include opening a bank account, activating a SIM card, or completing age/identity verification for online services. The product is designed for the B2C segment (end users), while a separate B2B offering exists for businesses wishing to integrate the solution into their own services. The solution leverages the German eID (Online-Ausweisfunktion) infrastructure, which is the chip-based digital identity feature embedded in official German identity documents. PIN unlocking via PUK is also supported within the app if the user's ID PIN becomes blocked.