The U.S. Postal Service is facing mounting pressure to crack down on counterfeit postage stamps after the USPS Office of Inspector General warned that fake stamps could be costing the agency hundreds of millions of dollars in lost revenue each year. The audit found that counterfeit Forever Stamps are widely available through online marketplaces and social media, often sold at steep discounts that make them attractive to consumers. Investigators estimated that USPS lost approximately $349 million in revenue during fiscal year 2026 and could face even greater losses without stronger anti-counterfeiting measures. The report urges USPS to improve stamp authentication, enhance mail-processing detection systems, and develop a comprehensive strategy to combat counterfeit postage. For the printing industry, the issue highlights how advances in digital printing technology have made it easier for fraudsters to produce highly convincing counterfeit stamps that are increasingly difficult to detect.