There are a few key things to look for when trying to determine if a website is legitimate. First, check to see if the site has a valid SSL certificate. This will ensure that any information you enter on the site is encrypted and secure.
Finally, check the site’s reviews and testimonials to see what other people have said about their experience. If the site has mostly positive reviews, then it is likely legitimate.
If you want to get more technical, do a whois search using https://www.whois-search.com or somewhere similar. When you type the website’s address in here it will show you ownership information (or links to the organisation hosting it) and tell you the age of the domain.
This is usually a good indicator of how trustworthy a site could be if the previous methods have left you wondering. An aged domain with clear ownership info vs. a new domain with private or hidden ownership info is a good barometer for whether or not the owner has something to hide.