CA SB301

Requires online marketplaces to collect specified information from high-volume third-party sellers (those with 200+ transactions and $5,000+ gross revenue in any 12-month period within the previous 24 months) within 10 days of qualification, including bank account information, name, tax identification number, email, and phone number.

Mandates online marketplaces verify seller information within 10 days and notify sellers annually that they must report changes to their information within 10 days, with failure to comply resulting in suspension of sales activity.

Requires high-volume third-party sellers with at least $20,000 in gross annual California revenues to provide physical address and contact information to the online marketplace and disclose this information to consumers in order confirmations and transaction history.

Allows sellers with residential-only addresses or personal phone numbers to request partial disclosure alternatives, and requires online marketplaces to provide consumers with a mechanism to report suspicious seller activity.

Establishes civil penalties of up to $10,000 per violation enforced by the California Attorney General, and requires online marketplaces to maintain seller information for at least two years with reasonable security procedures; effective July 1, 2023.