(CNN) A Florida school district that provides free meals to students in the county has retooled its program following suspicion that some people were picking up extra food and selling it online.

The Hillsborough County School District's new free meal program will require parents to provide their child's name and birth date or their student ID number when picking up their week's worth of food.

"It's a shame that a few of our community members would go to multiple sites, take food away from children and seek to build their financial portfolio on children who will not have food today," Superintendent Addison Davis said in a statement to CNN.

The suspicion started last week, when staff saw a "significant increase" in the number of meals served across the district, which includes Tampa, district spokeswoman Tanya Arja told CNN. Sites were running out of food.

This screenshot was posted by an adult who'd picked up multiple free meals intended for Hillsborough County students and sold them online, school district officials say.

Staff distributing the meals started to notice adults arrive to pick up meals with "our food already in their car," Arja said.

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