P&G has a little campaign for their Olaz product where you will get the price for your product refunded if you send them your sales slip along with a form. This form features a grid for your IBAN with DE already filled in for you. Have an IBAN from another country? No chance!
Screenshot of the form. (source)
Scrolling down further, their terms state, that a payment is only possible to residents in Germany with a bank account in Germany. This is not what the EU intended.