My wife was seeing a lot of fraud with her business. She only takes payment via PayPal. The fraudsters have been ordering via a local hacked computer with a hac

My wife was seeing a lot of fraud with her business. She only takes payment via PayPal. The fraudsters have been ordering via a local hacked computer with a hacked PayPal account that matches. Everything looks 100% OK (physical address matches, IP address matches, browser nice and normal, etc), but she gets hit by a PayPal chargeback 3 to 4 weeks later for a "non authorised payment". She now has to call each new customer to make sure that they are real. Interestingly, when she posted that she would call all new customers the fraud attempts went down to about 5% of the previous level.