Ok - do they "connect" their payment to my original payment which I made to them which shows that it is a refund of this original payment?
Or do they simply make a new payment to my PayPal email ad (same one I originally used), and state in this what the payment is for i.e. refund of payment with the original payment ID.
This, apparently, is what they are concerned about i.e. that if they simply make a payment to me, then it could be claimed that this wasn't a refund of the concert tickets and was for something else.