We analyze transactions to addresses that are in our blocklist. In this blocklist, we add addresses that are transmitted by our partners (other exchanges and services) who are aware of the facts of fraud and theft, as well as from victims who come to us with a statement that their funds were stolen.
[moderator's note: consecutive posts merged]
Do you actually block the address with someone's statement or verify some other information? It is also important to be 100% sure whether the complainant's funds have actually been stolen or not. I don't know how easy it is to analyze someone's transection so finely and I have no idea how high quality tools you use. It will be really interesting if you discuss in detail, so that crypto users can also be careful.