First of all, congrats on being promoted to Yondan. This is a pretty big step when it comes to the dan rankings, and many folks at this level open up their own schools.
As for the way you were promoted? At this stage, since you were a Sandan, it's more about what you do for the dojo, and what you are able to give back to the dojo (in terms of helping, knowledge, teaching, etc).
This is in contrast to what happened at the lower ranks, where it was more of what you were able to take from the dojo (knowledge, etc).
For yudansha being promoted to the higher dan rankings, it's not unusual for someone to be promoted without taking a physical exam, since the actual exam is one that is conducted over a long period of time. I've seen folks being promoted via public announcement, or even at a seminar / symposium, and they've all been legitimate promotions.
From that day forth, they were listed at their newly given ranks. The 11" x 17" parchment documents were simply icing on the cake. The same held true for those who tested for more advanced titles, such as Renshi, Kyoshi, or Hanshi. They were addressed as Renshi (insert name here) from that moment forth.
Being promoted by a personal e-mail is really no different than the senior sensei coming up to you in person, and saying "I hereby promote you to yondan." If someone wants to hold a nice ceremony, then so be it. If not, then that's their choice as well.
As for the way you were promoted? At this stage, since you were a Sandan, it's more about what you do for the dojo, and what you are able to give back to the dojo (in terms of helping, knowledge, teaching, etc).
This is in contrast to what happened at the lower ranks, where it was more of what you were able to take from the dojo (knowledge, etc).
For yudansha being promoted to the higher dan rankings, it's not unusual for someone to be promoted without taking a physical exam, since the actual exam is one that is conducted over a long period of time. I've seen folks being promoted via public announcement, or even at a seminar / symposium, and they've all been legitimate promotions.
From that day forth, they were listed at their newly given ranks. The 11" x 17" parchment documents were simply icing on the cake. The same held true for those who tested for more advanced titles, such as Renshi, Kyoshi, or Hanshi. They were addressed as Renshi (insert name here) from that moment forth.
Being promoted by a personal e-mail is really no different than the senior sensei coming up to you in person, and saying "I hereby promote you to yondan." If someone wants to hold a nice ceremony, then so be it. If not, then that's their choice as well.