Drive by commercial property to note any other businesses at the property address since not all leases are recorded and Google Maps® is not always up to date in rural areas. Running the property address through Google® for possible business names operating there, and then running the current owner and any possible business operating on the property in the Circuit Court and with the SCC for validity and any possible Financing Statements or Federal Tax Liens filed only on the state level.

For example: John Doe might own the property as an individual, but he may use it for his business - Dental Implants R US, and there could be filings for it under the business name, his name with last name first, (Doe, John) and his name with his first name first ( (Dr.) John Doe, DDS). Then, I see that Charlie Roe, who is an Oral Surgeon, also operates his business out of the same address. This means I have to run him and his business (in the same type of name permutations) in the Circuit Court and with the SCC whether or not there is a lease recorded in the Circuit Court.  

If the business is held by a partnership, running the partnership and all partners in the indices. Pulling and providing all of the partnership documents that are recorded at the courthouse.