The printed and signed online order and, in the following cases:

The principal is a legal person:
The certified copy of the Commercial Register excerpt is only required in exceptional cases. T-Systems checks the details of the legal person in the Commercial Register.

The principal is a public authority:

Official seal and signature of an authorized representative of the public authority on the order form.

The principal is an association:
The certified copy (not older than 30 days) of the Association Register excerpt.

The principal is a natural person:
No certificates are created for natural persons.

The principal is a tradesman:
The certified copy (not older than 30 days) of a current trade license and the personal ID of tradesman.