Most service points of Western Union work in the time convenient for customers throughout the week and throughout the year. The size of the commission fee for the transfer is charged according to the Western Union tariffs and depends on the amount of money sent. One of the common kinds of money transfer is a transfer via the international system of Western Union. In October 1871 the company has implemented the world's first telegraph money order. After a century money transfers have become a major source of income for Western Union.