I just typed in my question without any problems although I suppose it was account related in a small way.   I've had the same buyer purchase the same item two nights in a row..only registered the same day and with only a name and for the address it just had default, default Australia.    

I cancelled the first purchase,  ebay replied saying they would ask the buyer to agree?  Probably no chance of that.  So after last nights purchase I blocked the buyer and asked why they couldn't just de-register the buyer because of the address.   They just replied that I would have the selling fee returned once the case was closed!!!     

Not much point trying to cancel the sale if they ask buyers permission so I will just wait four days and report non payment.