If questions about the integrity of Wirecard AG’s accounting in its crucial Asian operations are ever to be resolved, Singapore regulators will need to step back and take a long, hard look at James Henry O’Sullivan’s relationship to the Aschheim, Germany–based company. Prosecutors at Singapore’s Consumer Affairs Department have been investigating Wirecard’s fast-growing Asian division, claiming in a March 8 filing that employees in its Singapore office orchestrated a complex, multiyear scheme to inflate the company’s revenue. Specifically, the regulators would want to examine O’Sullivan’s complicated role in Wirecard’s suspect October 2015 purchase of Great India Retail’s online payment businesses, which the Southern Investigative Reporting Foundation reported on in January 2018. Forty-six-year-old O’Sullivan, a native of England but said to be currently living in Singapore, seems to keep a low profile; his name rarely shows up in legal documents or on the internet, except in filings for a series of Isle of Man–based shell companies and a Luxembourg holding company, Caireen SARL. But sift through enough of this paperwork and a very distinctive picture of O’Sullivan emerges — that of a digital payments industry veteran with a cleverly hidden hand in nearly everything Wirecard does in Asia.