Which fields are required for a Secretary of State lookup?

For a single-state lookup, provide the business name (or state registration ID (sosID) if available) and state. That’s usually all you need — plus your API key.

• For batch uploads, add street/city/ZIP if you have them. This improves matching but must be exact (typos may cause false negatives).
• For full verification across all 51 jurisdictions, only the business name is required. The system will fan out across every state + DC in one request (3 credits).
• For TIN verification, submit business name + EIN. This matches directly against IRS records(3 credits).