"Several hundred students thought they were accepted to their Ivy League dream school, only to have their dreams dashed when school officials notified them about an hour later that it was a mistake.
Columbia University Mailman School of Public Health on Wednesday accidentally sent an acceptance email to nearly 300 students for the Master’s Program. About 75 minutes later school officials sent a follow-up email to say the acceptance email was sent in error." …
http://www.vocativ.com/403511/columbia-university-admissions-mistake/