Deloitte Touche Tohmatsu Ltd.'s credibility is under fire after the accounting giant missed a major fraud at Nigeria's Tingo Group Inc. The story unfolded in June 2023, when short-selling firm Hindenburg Research released a report titled 'Fake Farmers, Phones, and Financials - The Nigerian Empire That Isn't', accusing the agri-fintech group of companies of fabricating financial statements.