USPS HAZMAT Fee Update: How to Avoid the $50 Fee

As of July 12, 2026, USPS began charging a $50 hazmat noncompliance fee on packages that have hazardous material markings or aren’t shipped according to its hazmat rules. Since then, Poshmark has covered most of this fee for sellers. Starting October 19, 2026, sellers will be responsible for the $50 fee if USPS flags their […]