Lesson Nine GmbH
Max-Beer-Str. 2
10119 Berlin
+49 30 779079 400

Managing Directors: Markus Witte, Thomas Holl

Amtsgericht Berlin-Charlottenburg: HRB 110215

VAT ID: DE 257994711

Legal Department
Lesson Nine GmbH
Max-Beer-Str. 2
10119 Berlin, Germany
English: +1 (888) 901-2932
Spanish: +1 (888) 905-0289


The European Union provides an online platform for dispute resolution available for the settlement of disputes between professional vendors and non-commercial residents of the European Union (consumers), in the context of paid sales and service contracts. Participation in the online mediation program is voluntary. Also, if Lesson Nine does not participate in this program, our Customer Service department will continue to competently provide help to users: The online platform for dispute resolution can be found at

Picture credits

Credits and license information for the pictures can be obtained by moving the mouse over the picture and clicking on the c-icon in the upper left. is supported with finances from the European Regional Development Fund (ERDF) of the European Union