Western Union has taken of 451st position in the rating Fortune 500 in 2009, having moved from 473rd line in 2008. 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. One of the common kinds of money transfer is a transfer via the international system of Western Union. The Western Union Company is a financial services and communications company based in the United States.