The customs must confirm the export of goods. This you can do only at the last point where you will leave the EU. Usually this is done at the airport or at the border, for example, Germany – Switzerland. You have to present the purchased goods together with the Tax Free Germany voucher, the original invoice/receipt and your passport to the competent customs office. The customs stamps confirming the export of the goods. Only in combination with the customs stamp will our voucher along with the original invoice become an export document.