Chamoy Thipayaso (Thai: ชม้อย ทิพย์โส; RTGS: Chamoi Thipso; born 27 November 1940) is a former employee of the Petroleum Authority of Thailand. She is known for receiving the world's longest prison sentence of lifetime imprisonment or 141,078 years for her involvement in a pyramid scheme that defrauded more than 16,000 Thais and is estimated to have been worth between $200 million and $300 million.[1]