Brokering of and/or counselling about insurances requires a licence accoring with §§34 d and/or e of the German Industrial Code (GewO).

Responsible body: Hamburg Chamber of Commerce OR The Point of Single Contact in Hamburg

not an auction as defined under § 34 b of the German Industrial Code (GewO), the Auctioneer Regulation does not apply.

see Financial services

An itinerant trade licence is required under § 55 of the German Industrial Code (GewOW) for the commercial sale of goods outside commercial premises, or where no commercial premises exist, either via others or in person and which have not been pre-ordered, or for the distribution of orders or if you provide theatrical entertainment.
Responsible body: Consumer Protection Agency OR The Point of Single Contact in Hamburg