EL PASO, Texas -- If you're a University of Texas at El Paso student, you’ve probably gotten a letter in the mail from the university saying your Social Security number was visible when your tax form was sent out.

UTEP said they notified 15,000 students but they don't know exactly how many students were affected.

UTEP blames a glitch in a machine used to fold letters when student’s forms were sent out.

"Some of the forms were folded in such a way that the document shifted on the envelope and allowed for the Social Security number to be visible through the mailing window on the envelope," said Jose Hernandez with UTEP Business Affairs.

Hernandez said this is the first time UTEP has encountered a problem like this and said students should monitor their credit report.