When you get your secondaries this summer, most schools will send you forms to attach with your letters of rec, give to the physicians, etc. You don't need to worry about this -- probably the best "form" for the letter writers to follow is to include your full name and social security number in the header of each page of the letter. I had all of my letters collected and waiting at my college reference letter service, and they just sent out copies for me as I contacted them. I didn't worry about any of the extra forms I received with my secondaries, and it wasn't a problem.