In the modern world, not only the quality of products or services is important, but also the way of interaction with customers. Mistakes in communication can cause loss of customers and a negative company image. To avoid such situations, the following basic points must be taken into account. 1. Inability to listen. One of the most common types of mistakes is insufficient attention to the client’s opinions and needs. It is important not only to speak, but also to listen to the client, take into account his opinion and preferences. 2. Insufficient professional knowledge. An untrained employee may not only make mistakes in communication, but also will not be able to competently answer customer questions, which will negatively affect individual service. 3. Negative attitude. A company employee should always remember the importance of positive communication with the client. A hostile attitude can affect the reputation of the company as a whole.