Soon-Kian Phang wrote:
From what I've seen, it's possible to get graded as a visitor if your Sensei accompanies you and recommends your promotion (I've seen this happen for a group dan grading). However, this particular grading was separate from the normal monthly dojo gradings.
That's not uncommon - Kobayashi Dojo (for example) usually borrows hombu for the day and does a whole bunch of tests at once. What this sounded like to me was more along the lines of someone dropping in from out of town (or out of the country) for a week or two and trying to take part in grading at hombu.