User Activity

Has the ebay authanticity department ever made a mistake?
I have been an eBay member for over 20 years. Buying mainly, but selling a few things every year. I just sold a handbag and I have a message asking me to verify my Bank Account. Why. I have used the same bank for 20 years and I have never been asked ...
I notice that some sellers are charging for Registered Post if an item is paid by Paypal. (Saying this is the Paypal rule) Is this correct? I thought the Click and Send bags had enough in the way of tracking. Please help
The seller used "Crepe" in the Title and the Polyester&Elastane in the details.......my loss