Yes, you do. Only an authorisation entitles another person (spouse/life partner, manager, tax adviser, employee of a publisher, or others) to use the online portal for you. General powers of attorney already in existence or GEMA authorisations are not sufficient.
Own online account for authorised representatives:
In order for the authorised representative to be activated for online portal access, they need their own online account with their name and their personalised e-mail address. Such persons must create the account themselves.
To the instructions
Grant an authorisation for online portal access:
If you grant an authorisation, you (as the authorising party) and the authorised representative must sign the respective form, an electronic signature is not accepted. You can then scan the form and e-mail it or post it to the contact details indicated on the form.
Online portal authorisation