I don't mean to be a party-pooper, because this is still a funny idea, but I'm afraid it isn't quite real: http://www.snopes.com/college/admin/rejection.asp
I once got a rejection letter for a job I applied for that said: "We received a high number of excellent applications so yours was not required". I wish I'd thought of rejecting their rejection.
http://www.snopes.com/college/admin/rejection.asp