A-Trust Support

Help and support


The frequently asked questions for you at a glance

Go to FAQ

Online help

Didn't find what you were looking for in the FAQ?

Write an E-Mail Ticket-Tool Support agreement

Technical support

You can also reach our fee-based technical support Monday to Friday (weekdays) from 8 a.m. to 6 p.m. with the number 0900 940910 (€1.09/min)*.

Do you have questions about one of your A-Trust certificates?

Please contact our support team, which is available Monday to Friday (weekdays) 08 a.m. to 6 p.m. You can reach us either via our chargeable hotline (€ 1.09/min)* or free of charge by e-mail to
You are also welcome to take a look at our FAQ, where the most frequently asked questions are answered. On our statistics page you can also get a live impression of whether our certificates are running smoothly from a technical point of view.

* A-Trust Support takes the time needed to provide detailed, individual and technical answers to customer questions. The operation of the telephone service hotline is therefore time-consuming and cost-intensive - in order to be able to deal with every telephone inquiry and guarantee the quality of the service, a call to the service hotline is subject to a charge. E-mail inquiries, on the other hand, are free of charge and are processed with the same level of service.

Do you have questions/problems with your ID Austria?

Please contact the free BRZ service hotline on +43 50 233 770, available from Monday to Friday, 8 a.m. to 4 p.m., or

Revocation service

Revocation service for user certificates
(e.g. a.sign premium, xIDENTITY, ID Austria)
Around the clock - 365 days a year
Revocation service for server certificatesMon - Fri: 10 a.m. - 6 p.m
Revocation service for developer certificatesMon - Fri: 10 a.m. - 6 p.m

Fax form for withdrawal requests: