Texas State University accidentally sent out acceptance brochures to 450 prospective students last month.

A third-party mailing service sent out letters to hundreds of students who did not get accepted into the school on March 27. While some of those students completed their admissions applications, many were incomplete, The America-Statesman reported.

"That excitement. That big old smile. Lots of hugs and you know we get to brag that he's been accepted and now what you do? How do you tell people that there was a mistake, that he's not in? We're not sure. There's a lot of angst on that," John Hastings, whose 17-year-old son was one of the prospective students who received an acceptance brochure, told KVUE News.

The acceptance material prospective students received contained orientation and residence hall information.  Blaschke said this is the first time a mistake like this has happened at the university in San Marcos.

"A letter is expected to be mailed out today to any of those 454 who have been denied admission or incomplete admissions acknowledging the error and clarifying their status," university spokesman Jayme Blaschke said in an email, according to San Antonio Express-News. "Texas State is reviewing the process to understand how this happened and to ensure it does not happen again."

In February, Carnegie Mellon University accidentally admitted nearly 800 applicants to their master's program in computer science.

In December, Johns Hopkins University sent nearly 300 prospective students false acceptance emails.