How do you know if a website is certified?

When it comes to verifying the authenticity of a website, especially in the realm of cryptocurrency and finance, how can one confidently determine if it is indeed certified? Is there a universal standard or a series of checks that one should undertake? Are there specific seals, logos, or certifications to look out for? And how can one ensure that these certifications aren't just cosmetic, but genuinely represent the credibility and trustworthiness of the website in question? I'm curious to know the process you, as a professional in this field, would recommend to discerning internet users seeking secure and reliable platforms for their financial transactions.