Unauthorized trade is street trading that was conducted in the wrong place. As a business without permission and registration, the trader leaves the tax authorities. This is, of course, a violation of tax laws.
Illegal trade is prohibited on Russian soil, but it still occurs. Although that's what everyone in their town sees, you can't just go out on the street and sell some of your things. There are markets and fairs where you need to pay for the place of trade, where they check the quality of the goods and allow the sale.

Unauthorized trade refers to the movement of goods or services across borders without approval from the appropriate authorities. These types of movements are typically unreported, untaxed, and unregulated. Unauthorized trade is often associated with trafficking networks which concentrate on moving illicit substances.