Do the Ivies, Duke, NYU, and Vanderbilt send out formal rejection letters via mail?
I don’t know about everyone but Cornell had it online and gave me the option to print it out. It said you don’t get it in the mail unless you request it over email. Check your portal.
It depends. My alma mater does not mail a letter to any applicant who has logged onto the decision portal to see his rejection result. I suspect many others do the same.