First look up their License # (check license number here)and check to see if the individual is an owner,partner,officer of the corporation or responsible managing employee of the company which would supersede the HIS License as the individual has passed all background checks and is legally able to solicit,sell,negotiate or execute home improvement contracts.If the individual is not listed as the owner,partner,officer of the corporation or responsible managing employee of the company then they must obtain their HIS License to be on your property. You can verify whether the individual has obtained their HIS License here(check license number here).