Denver-based Chipolte Mexican Grill was forced to terminate hundreds from its 50 Minnesota locations after an I-9 audit turned up a large number of undocumented workers. The total Chipolte workforce in the state before the audit stood at 1,200.

Co-CEO Monty Moran said: "We are surprised at what’s happened here because we are very careful about who[m] we hire, and we try to hire the very best people. For each person, we get all the required documents. And even after those reviews, we found that lo and behold, we’ve got a good number of people who apparently submitted documents which were in fact not authentic, despite the fact that they looked to be."

From fiscal year 2009 to date, Immigrations and Customs Enforcement (ICE) agents have initiated Form I-9 (employment eligibility verification) inspections against 3,769 businesses across the nation.

Don't get caught with undocumented workers during a surprise I-9 audit. Prepare carefully by getting your copy of Personnel Concepts'  I-9 Compliance Kit.