Ever since people began buying and selling goods, a payment system of some form has always been a part of the daily lives of people. Payment system has developed and evolved with the expanding economy and the advancing technology. The complexity of modern economic system and technology has made payment system all the more important, deserving of continuous development in order to ensure that it keeps pace with the needs and requirements of the business sector, the financial institutions, and the general public. This book compiles background information about the payment system in Thailand, and is intended to be used as a study reference for financial and banking sector professionals and anyone wishing to gain an overall picture of the payment system as well as understand the methods, procedures, processes and mechanisms involved. It is hoped that such understanding of the payment system, and how it relates to the country’s economic transactions, would be of use in guiding private-sector developments in conjunction with the overall policy direction of the Bank of Thailand.