Effective service delivery is not only the process of exchanging values, the performance of other supporting activities is even more important. Among these activities are provision of information and advice, responsiveness to customer needs, handling complaints and common courtesy. It is understandable, that all these activities are easier to perform when delivery is full – serviced or at least half- serviced. When participation of customer is increased the involvement of trained personnel is limited to minimum. In this situation customer must have access to information they need, way to express complains and give recommendation if they have one in their mind.