One who verbs is an associated noun.*

One who buys is a buyer.
One who sells is a seller.
And most importantly at this moment, companies that sell insurance are insurance companies, with all the rights and duties thereunto appertaining. Except when they aren't.

Mere policing doesn't result in officer status.
But mere selling does result in seller status, licensed or otherwise. Complete with associated fines.

*Scott is a dreamy fount of useful quips.