To verify that you are actually on Stripe’s website, you can check that the website is being served over HTTPS by looking out for a green lock next to the URL of the website. Stripe’s pages all have an Extended Validation certificate, which you can inspect by clicking on the lock. It is typically displayed with a prominent green banner. Here is what it looks like on common browsers:
If you have received a suspicious email that looks like it is from Stripe but appears to be a phishing attempt, reach out to Stripe Support.