Start with the basics: confirm the official domain, read the homepage closely, check whether the project explains who operates it, and look for support, terms, privacy, pricing, and refund information. A trustworthy site should make its purpose understandable without forcing users into a signup flow first.
Then look for consistency. Compare the claims on the homepage with support pages, product pages, social profiles, documentation, and independent mentions. Gaps do not automatically prove fraud, but unexplained gaps should lower confidence until the project provides clearer evidence.
Finally, separate platform-level trust from transaction-level trust. A website may be legitimate while a specific seller, listing, payment request, or message is risky. Keep screenshots, use official contact paths, avoid off-platform payment pressure, and treat urgency as a signal that needs extra verification.