Depending on the content and destination of the letters.
You send dispute letters until you have received the results you want.
Yes, you can definetly send letters to people. It's called M-A-I-L.
Cornell University sends out their acceptance letters in or around the month of December. They will send the letters to the address they have on file for you.
No.
you need to register friends on the friend list and then you will have the option to send them swapnote letters.
Yes, you can send Interfolio letters to yourself for future reference.
write them then send them?
Yes Letters can be sent to nearly any where.
No.
Yes.
No, you can't.
Grad schools typically send out acceptance letters first, followed by rejection letters to applicants who were not accepted.