What is meant by "no official" hotel classification?

In Germany the hotel star rating is a can do, but not a must have for a hotel property. Hotels with "no offical" star rating did not apply for an official classification, but according to the hotels own evaluation, their services are if not equal at least very similar to the pre-defined star rating criteria.

If you require more information on the German Hotel Classification system, please visit the Website of the German Hotel Association DEHOGA.