 The Post has the responsibility to provide, five days a week within the area of the entire country, services including clearance, sorting, transport and delivery of letters, including registered letters and declared-value letters, up to 2 kg; postal parcels, including the declared-value parcels, up to 10 kg (parcels sent from abroad may weigh up to 20 kg); and postal items for the visually impaired persons up to 7 kg.In addition, it must enable the sender, at his request, to receive the document confirming the receipt of the registered parcels.The basis for the postal organization was the trading postal service, which derived from the merchants' need to communicate on commercial matters.