A recent OIG report highlighted that multi-carrier shipping platforms sometimes charged merchants higher-than-necessary U.S. Postal Service (USPS) rates, potentially leading to a loss of business for USPS. The report, covering November 2023 to January 2025, noted that while most packages were charged accurately, some incorrect postage submissions occurred due to software issues, resulting in an estimated $1 million revenue loss for USPS. The Postal Service plans to implement improved software and monitoring to enhance postage accuracy and ensure proper revenue collection moving forward.

Source: https://www.supplychaindive.com/news/us-postal-service-merchant-postage-rates-oig/752981/