How Identity Verification for Digital Signatures Works

The qualified electronic signature (QES) is becoming increasingly important—and for good reason: It is the only digital signature in Europe that is the legal equivalent to a handwritten signature. This ensures maximum legal security and protection against tampering. In our increasingly digital world, it is essential to sign documents quickly, securely, and legally.

However, before a QES can be issued, the identity of the user must be verified. There are various verification methods that meet the highest security standards. In this article, we will present the most common methods and explain how you can obtain a QES.

Online Identification Methods

1. Robo-Ident / Auto-Ident – Fully Automated and Efficient

These identification methods rely on artificial intelligence: A software application verifies the ID document and compares the image with the applicant’s face—without any human interaction. This makes the verification process extremely fast, eliminating the need for a live video call. In some cases, a manual review may be required to meet the high security standards. A-Trust partners with innovative providers such as NECT and PXL Vision offer this solution.

2. Video-Ident – The Fast and Flexible Solution

The Video-Ident method enables convenient identity verification via a secure video call. A trained employee of the identification service checks the ID document and matches the details with the applicant’s data. Since this process is location-independent, it offers great flexibility. This method is widely used in industries such as banking and online services. A-Trust collaborates with partner companies like WebID, which meet all legal requirements for a valid QES.

3. Identification with the German eID – Secure with NFC

The German national ID card (nPA) allows for highly secure online identification via its eID function. Users can verify themselves easily and quickly using an app or a card reader. Since the nPA is issued by the authorities and utilizes modern NFC technology, it offers a high level of security. A-Trust partners with providers like Authada, which specialize in this method.

In-Person Identification

Identification by a Registration Officer

In this method, identity verification is carried out directly by trained staff (Registration Officers). These professionals personally check ID documents and then issue the qualified signature certificate. This method is particularly useful for businesses that regularly integrate new employees or customers into their signature workflows. Companies can also train their own Registration Officers with A-Trust, allowing them to issue QES certificates independently without relying on external providers.

Special Case: ID Austria

In Austria, ID Austria is a government-regulated solution that can only be applied for through official state authorities. This process provides exceptionally high security and complies with all legal requirements.

Conclusion – Which Method is Right for You?

The best identification method depends on individual needs and technical requirements. While online methods like Video-Ident and Robo-Ident offer a fast and flexible solution, in-person verification by a Registration Officer is ideal for companies that frequently issue signature certificates. Regardless of the method you choose, the qualified electronic signature (QES) provides a secure and legally binding way to sign documents digitally.

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