From the article:
"Federal imprisonment for unpaid debt has been illegal in the U.S. since 1833. It’s a practice people associate more with the age of Dickens than modern-day America. But as more Americans struggle to pay their bills in the wake of the recession, collection agencies are using harsher methods to get their money, ushering in the return of debtor’s prisons.
NPR reports that it’s becoming increasingly common for people to serve jail time as a result of their debt. Because of "sloppy, incomplete or even false documentation," many borrowers facing jail time don’t even know they’re being sued by creditors … "