you can go back into your email account and see if you can find the PayPal payment advice OR the eBay 'You won' email if you still have them.  I have folders in my email account for these things so I can go back and check.  One folder is just for PayPal emails, another is for invoices etc etc.  They don't clog my inbox as I move them to the appropriate folder as soon as they arrive.  I can go back and check emails right back to when I joined eBay.