Every entrepreneur – legal entity has got a data box; they are allotted access data to the data boxes automatically on incorporation. No all of them may agree that the system of communication through a data box is an advantageous one. For example, you don’t have to go to the post office and be queuing for a letter. Any communication with the authorities is possible from any place and at any time thanks to data boxes on condition that you have access to the Internet. Sending papers to the authorities via a data box is free of charge; each sent message gets an advice of delivery evidencing the date of sending, and there is no need to use an electronic signature.