Illinois has no statewide STR platform-mandate law, and Cook County Ordinance 19-5236 places primary compliance duty on the host rather than the booking platform. Platforms cooperate voluntarily on tax remittance and registration data without strict statutory liability.
California, New York, and several other states impose direct STR platform obligations such as listing-verification, blocking unregistered listings, and statutory liability for facilitating illegal rentals. Illinois does not. Cook County Ord. 19-5236 makes the host responsible for registration, taxation, and operator standards. Major platforms voluntarily collect and remit the Cook County Hotel Accommodations Tax under separate agreements with the Department of Revenue and respond to subpoenas for booking data, but they are not statutorily compelled to verify each registration before allowing a listing. This places enforcement risk primarily on the host. Cook County suburbs and Chicago's MCC 4-13 take a stricter platform-side posture under city law.
Hosts who hide behind platforms, list unregistered units, or fail to remit Hotel Accommodations Tax remain personally liable. Platforms that ignore subpoenas or breach voluntary agreements risk Department of Revenue tax assessments and Cook County State's Attorney litigation.
See how Des Plaines's host platform liability rules stack up against other locations.
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