CHICAGO (AP) — Some 10,000 immigrants in Illinois are among more than 200,000 nationwide whose insurance bought through President Barack Obama’s health care initiative could end this month if they don’t prove this week they’re legally in the country.

The federal government mailed letters in English and Spanish last month notifying about 300,000 people that if immigration and citizenship documents aren’t submitted by Friday, their coverage under the Affordable Care Act will end Sept. 30.