Thanks for the information guys...I was about to ask the same question after receiving a payment via after pay this afternoon!

Unfortunately, blacklisting does not completely sort the issue.  I recently blacklisted a member with rubbish feedback, and the next thing I know, this trader has placed a winning bid on one of my auctions, which she did not complete, so earnt herself another negative.  Apparently this is a glitch which trademe are trying to fix, but yes, it is frustrating, when you get requests from a blacklisted member. Unfortunately, blacklisting does not entirely restrict them..

Kia ora S Yes it is a KP reference and the number starts with a 5. Thankyou so much for clearing this up for me...I was worried it might be dodgy.

I'll also add that the notification email that item has sold came from an email address, notifications@transactional.trademe..