Before You Bid: An OSINT Framework for Spotting Fake Online Auctions

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Learn how to identify fake auction websites using OSINT, company registration checks, domain history, auctioneer verification, and payment audits.

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Fraudulent auction websites can imitate legitimate businesses using convincing branding, registration details, and payment instructions. This guide explains how to investigate their claims using independent sources, including Brazilian CNPJ records, official auctioneer registries, domain registration data, and payment beneficiary information. It also explains why HTTPS certificates, professional design, and an absence of complaints are insufficient evidence of legitimacy.