I got accepted into a program a few weeks ago and made the decision to NOT attend. However, they don't have a SIR to fill out, and only provided an email address. Of course, in providing the email address they said something to the effect of, "Confirm your acceptance of the admission offer by emailing email@school.edu with your name and the program."
Can I deny the admissions offer to this email address or should I keep waiting for them to send info about a SIR?