I am fairly certain Moshe Feldenkrais never required any of his original students in Israel to join a guild nor pay him fees or royalties. They never signed legal agreements limiting how they would use the work. And he never sued anyone that went their own way.
Do you or anyone that you know have evidence to the contrary? If so, I would like to know about it. Just leave a comment below or send me an email via my contact form.
Later in his life, Feldenkrais did create a certification training and awarded a piece of paper to those who completed it. And yes, he did charge people to get that piece of paper. But I am not aware of him authorizing anyone else to award that piece of paper nor teach using his name. Again - If I am wrong and you have documents that would prove otherwise, please let me know.