poll Any fraud detection ?

I sold one domain in Flippa for more than 2 years ago and buyer didn't want to tell flippa escrow that domain has been received in his godaddy account and my money has been frozen for sometimes. After showing the transfer confirmation from my dynadot account , flippa has been banned his account there and released my money finally. Now after years he hasn't changed my email address in his account yet.

If is there any other fraud detection anyone encountered please share it here to know about those fake deals better.