If your committee coordinator will upload it to VirtualEvals or Interfolio with his/her committee letter than bring it. BUT, before you get it from the D.O. have him put it in an official sealed envelope or have the D.O. mail it to your advisor at school, but check with your advisor first to see if it is OK.
I didnt do either. My D.O. actually hand mailed his letters. They got to the schools fine. Whether he personally did or his secretary is another thing.