(LIFEINC.TODAY) — Americans owe roughly $1 trillion in student loans, and now several leading universities are suing their former students to get some of their money back.

Yale, the University of Pennsylvania, and George Washington University all have sued graduates over failure to pay, according to court records. Penn filed two dozen cases last year alone, a 35 percent jump over the previous year.

None of the schools would comment to TODAY, but George Washington University said it turns to litigation as a last resort.

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