Which email address does my customer send a payment to?
If a buyer sends their payment to an email address that you haven’t added to your account, we’ll send an email to that address. After you add that address to your PayPal account, the money appears in your PayPal balance.
If a buyer is paying you for an eBay item, they must send their payment to the email address you selected when you listed your item. (You entered this email address on the Sell Your Item form.)