Regulators and official sources
Start with state insurance departments for insurer/producer licensing, consumer information, and complaints. Use official workers compensation and workplace-safety agencies for those topics.
Current business documents
The strongest source for a specific insurance decision is usually the live document: quote, application, declarations, policy form, endorsement, certificate, contract, audit, or claim letter.
Secondary sources
Carrier and marketplace educational pages can add context, but their examples and averages reflect their own products or customer data.
Related reading
Sources and verification
Use official and primary sources to verify current rules, insurer licensing, policy wording, and state requirements. The declarations page, forms, endorsements, and signed contracts control the actual insurance relationship.