For example, my old instructor never to anyone about the aikikai blue books, nor would he let you have it. That was because they do not associate with any other dojos or instrctors and do not want their students training anywhere else. They teach that the Iwama style is the only true style and that anything else you learn is garbage. The one thing they do say that I agree with, is that they got tired of all of the politics. When I left, I asked for my blue book. My shodan ranking was marked by the Late Toyoda Shihan with whom the had links to.
What is this blue book? I'm an Aikikai nidan and I've never seen nor heard about blue books. I have a card with my rankings, and I had some kind of membership card I think. Neither is blue.