Stripe’s Radar service or tool is very powerful. They have been building and fine-tuning it for years, powered by machine learning and input from tens of thousands of users I can say that these days it’s one of the best fraud prevention solutions if you accept payments via Stripe. I don’t say it’s perfect and works 100% of the time, you can still get some fraud payments going through the system but it’s able to catch and prevent most of them. Writing blocking rules tailored to your own needs and preferences is huge and a simple process, you can get familiar with the system very quickly. I wrote a detailed guide on Radar based on my own experience covering some of the most common attempts and how you can block them. You can take a look here https://kinsta.com/blog/credit-card-fraud-stripe/