They should be easy to contact via discoverable contact details or even a toll-free number, which is rare for scammers. Red Flags to Watch Out For

If the "About Us" page mentions a different company name than the homepage, it may be a template-based "front" for an overseas manufacturer.

Trusting a webmaster—the person responsible for your site’s health, security, and performance—is a critical business decision. While a web designer focuses on visual aesthetics, a webmaster ensures the site remains functional, updated, and secure. Key Trust Signals for a Webmaster

Use of services like "domainsbyproxy" to conceal ownership information can be a warning sign.