This website works like a shop. It has a shop system in which a customer who wants to purchase an energy certificate for his property can add the appropriate one to the basket: flat, house, commercial premises, pay for the order and be redirected to the form where the system checks whether the customer has purchased the appropriate certificate. If so, he is admitted and given the opportunity to complete and submit the form.

The main advantage of the website is a very extensive form and sending system.