Company seals

Qualified company seal

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Seal documents digitally with a.sign seal qualified and provide them with your personal qualified company stamp. The company seal corresponds to a qualified signature for legal entities and can be provided with the logo of your company. A-Trust offers not only the highest possible security, but also individual solutions - tailor-made for your company.

Your benefits

Convince yourself the numerous advantages of our qualified company seal.

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eIDAS compliant

With your qualified electronic company seal, you seal documents as a legal entity visibly, including your own logo, as well as eIDAS-compliant and therefore also legally valid throughout Europe.

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easy sealing

Seal documents within a few seconds, independent of time and place. Integrate your individual company seal quickly and easily in your Signatur-Box and benefit from automated processes and the batch signature.

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Purchasable online

The perfect solution of our qualified seal can be purchased conveniently either via an uncomplicated online ordering process or via a customized offer from our sales team and does not require any additional hardware.

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Investment security

Thanks to 5 years of validity, our solution is investment-proof and you will benefit from your company seal in the long term and even with future regulatory requirements.

One seal, numerous use cases

Use your qualified seal to securely seal e-invoices, for example.

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Secure digitization of document workflows

Qualified electronic seals enable the holistic digitalization of signature processes without media discontinuity and also create additional security for companies and their stakeholders. Applying a qualified company seal not only proves the authenticity of the documents - and thus creates trustworthiness - but also ensures the integrity of documents, as they cannot be subsequently changed.

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Compliance with legal requirements

Qualified company seals help to fulfill regulatory requirements, such as the legal requirements for e-invoices: In Austria, Germany and Switzerland, it must be possible to guarantee the authenticity of the origin and the integrity of the content of an e-invoice; see §11 UstG (AT) or §14 UstG (DE) or GeBüV (CH).

The right solution for any requirement:

a.sign seal qualified Basic

  • up to 12,000 qualified seals per year
  • no additional hardware required
Order now

a.sign seal qualified Enterprise

  • unlimited sealing volume
  • no additional hardware required
Request offer now

Requirements for issuing a qualified seal

Two requirements must be met for the authentication of the respective legal entity and the issuance of your qualified company seal.

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EU registered office

A registered office within the European Union is required for the issue of the qualified company seal. We therefore check your data using an excerpt from the Austrian commercial register or from the European Business Register (EBR). Non-registered organizations must provide copies of alternative documents to verify existence.

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Unique identification

The clear identification of the authorized person takes place via the qualified signature of a document (e.g. ID Austria or xIDENTITY). If you have submitted all the required documentation, you should receive your certificate within 1-2 working day.


All prices in € exkluding 20% VAT

a.sign seal qualified

a.sign seal qualified Basic – Certificate (per year – Fair-Use; max. 12,000 seals per year)€ 1,000.00
a.sign seal qualified Enterprise - Certificate (per year)upon request

3 simple steps to get your a.sign seal qualified

Get your qualified company seal from Austria's leading trust service provider in 3 easy steps.


Request offer

Request a customized offer for your individual sealing solution today: Simply contact the A-Trust Sales-Team by e-mail.


Finalize offer

Return the signed offer to our sales team.


Integrate interface

You will then receive the documentation for integrating the interface (via github/a-trust) in order to seal documents in a qualified manner.


Fill out form

Fill out the order form on our website and have the document signed by the authorized signatory. (e.g. with your ID Austria).


Select payment method

Choose whether you want to pay for your qualified company seal yearly with direct debit or once using a payment slip for the entire duration of the certificate's validity.


Integrate interface

You will then receive the documentation for integrating the interface (via github/a-trust) in order to seal documents in a qualified manner.