In the Polish labour market, there are many forms of contract that can be the basis of employment. In some industries, we are seeing an increase in the popularity of cooperation on the basis of the so-called “cooperation”. B2B contract, which is becoming an alternative to the traditional employment contract. Many people face the dilemma of which form of cooperation to choose. Talking with candidates, I see their little knowledge of these agreements, confusion of concepts and belief in popular myths. In this article, I decided to introduce both forms of employment. I would also add that the topic is very broad, covering many nuances that would require a whole series of publications. The purpose of this article is to provide an introduction to the topic, it is intended to be a good starting point for further consideration. I invite you to read!