A landscape company has been found guilty of exploiting foreign laborers. The U.S. Department of Labor has charged Ultimate Services Professional Grounds Management Inc. of Wolcott, Connecticut, $300,000 in fines and back wages owed to foreign workers operating on temporary visas.

The Labor Department’s investigation also found that the company kept inaccurate recruitment records. According to the department, most of the domestic workers listed as employees didn’t actually work there. That puts the company in violation of the H-2B visa program, which requires workers to make proactive efforts to hire domestic workers before turning to non-citizens.