How to delete a Poshmark account from your computer or mobile device Meira GebelJan 15, 2021, 03:17 IST You can delete your Poshmark account from the Account tab on either the mobile app or website.Luis Alvarez/Getty Images You can delete a Poshmark account easily on either the desktop website or mobile app. Poshmark is an e-commerce website and app where users can buy and sell used or new clothing, accessories and home decor from millions of closets. Poshmark is an e-commerce marketplace where users can buy and sell used, new, and vintage clothing and accessories from individuals and boutiques. Poshmark features millions of sellers, and dozens of categories depending on clothing styles and designers.