Mar 15 2019 News The Risks Of Second-Hand Inventory “There is a widespread practice in this industry which puts advertisers at risk: resellers acquiring inventory from other resellers. With such an overly complex supply chain, it is difficult or even impossible to verify the legitimacy of supply. When publishers tolerate this practice, they may unwittingly give their seal of approval to fraudulent supply via their ads.txt files.” Second-hand inventory is a plague in the industry. Find out what it is, how it happens and how to stop it. Read more from Centro’s Ian Trider in AdExchanger.