FC Slovan Liberec's official website passes the basic trust check for a professional sports club. The domain has been registered since 2001, the operator is a publicly listed Czech corporation, and the site includes the legal disclosures required for EU businesses. For fans looking for match info, tables, and club history, there is nothing here that suggests a scam or fake operation.
The two points that give us pause are technical rather than sinister. The site still accepts old, insecure TLS versions that modern browsers have stopped supporting, and there is no record of the site in the Wayback Machine. That second point is unusual for a club founded in the 1950s. It may mean the site was recently redesigned from scratch, or that the operators blocked archiving. For a site that only displays information and doesn't ask for payments or logins, neither issue is a dealbreaker.
fcslovanliberec.cz reviews from fans are generally positive, and the club's social media links confirm this is their real online home. If you are just checking fixtures or reading about the team, it is safe to browse. The main thing missing is a visible contact form or email on the homepage, which would make it easier to reach the club directly.