I have to agree with Yiliquan1 in that an instructor who has no documentation for his/her students is creating a big problem for the student later on. This issue about the letter for the one student, what happens if that student takes up another system after his instructor has passed on, there is no one to write a letter then.
Also, I think that a student who is so worried about what rank people think they have, needs a few more lessons before allowing them to continue their MA training. Why does the rank, or belt the student wears make that big of a difference? I think they have their head in the wrong place. If they are really wanting to learn the new system they would want to start at the begining themselves. They wouldn't even ask to be allowed to carry their ranking.
7sm
Also, I think that a student who is so worried about what rank people think they have, needs a few more lessons before allowing them to continue their MA training. Why does the rank, or belt the student wears make that big of a difference? I think they have their head in the wrong place. If they are really wanting to learn the new system they would want to start at the begining themselves. They wouldn't even ask to be allowed to carry their ranking.
7sm