In the 30's of the twentieth century, Western Union has become the world's largest telegraph company. Each money transfer is protected with control number, that allows you to track and to ensure prompt payment of money specified by you person. Payment systems are one of basic elements of infrastructure of e-commerce. In 1879 Western Union left the telephone business after losing a lawsuit against Alexander Graham Bell - the patent holder on the phone. Number of active holders of "Golden Card" of Western Union amounted to 9.5 million people worldwide.