Understanding <a href=https://npprteam.shop/en/articles/classifieds/fraud-involving-physical-goods-substitutions-fake-receipts-couriers-and-triangles/>how to prevent classified ad fraud in ecommerce</a> is essential for sellers and platform operators facing an increasingly sophisticated threat landscape. Classifieds platforms have become prime targets for fraudsters who exploit the direct-to-consumer nature of these marketplaces by deploying goods substitution schemes, fabricating courier documentation, and leveraging triangulation tactics to obscure their identity and intent. The article dissects four major attack vectors: physical product swaps where inferior items replace ordered goods, counterfeit receipt generation to simulate legitimate transactions, fake courier involvement to create false proof of delivery, and complex triangle schemes that distribute fraudulent transactions across multiple accounts and jurisdictions.