On Sept. 15, Immigration and Customs Enforcement (ICE) officials sent out another 500 notices of inspection (NOIs) to businesses suspected of employing illegal immigrants. ICE agents will be auditing these firms’ I-9 employment verification documents.

Affected businesses were given three business days to prepare for the inspection, so the audits should already be under way.

Fines for uncorrected technical and substantive errors on the forms range from $110 to $1,100 per form. Higher fines apply for intentional or known employment of unauthorized workers.

Personnel Concepts maintains a complete I-9 Compliance section on its Web site to help employers stay in compliance and avoid the fate of these 500 businesses.