It's hard to find a person who hasn't dealt with a contract at all in their life. We commonly conclude contracts such as: employment contracts, loan contracts, contracts for the purchase of a house/apartment or a car, apartment or house rental contracts, contracts for the provision of telecommunications services, construction works, contracts for specific work or commission. Therefore, it seems that the concept of a contract has already become firmly established in our consciousness. However, one may wonder whether there is an equal awareness of the consequences arising from such an agreement. Unfortunately, still few people know how to influence its content (even before its conclusion) and protect their own interests as effectively as possible.