OH SB184

Requires online marketplaces to collect and verify bank account information, contact details, tax identification numbers, and exclusivity information from high-volume third-party sellers (those with 200+ sales and $5,000+ gross revenue in 12 months) within 24 hours of becoming a high-volume seller.

Mandates online marketplaces verify seller information within three calendar days and annually notify sellers to certify their information is unchanged or provide updates, with suspension of marketplace participation for non-compliance.

Requires high-volume third-party sellers to disclose to consumers their full name, physical address, contact information, and whether they manufacture, import, or resell products, either on product listings or through conspicuous links, with limited exceptions for residential addresses and law enforcement participants.

Establishes reporting mechanisms for consumers to report suspicious seller activity electronically or by telephone, and requires disclosure when a marketplace fulfills orders if the actual seller differs from the listed seller.

Classifies violations as unfair or deceptive acts under consumer protection law, grants injured persons a private cause of action, and preempts local governments from imposing different or additional verification or disclosure requirements.