Excellent point there Mr Toggleswitch - duty free shopping is a must when going overseas. May I add that it is important to mention, when making purchases that one wishes to reclaim the VAT on, that one is only a passing tourist and for what purpose the receipts are required. Though, do not assume that providing such important information will motivate the person, checking out your goods, to provide the correct details on your receipts. I've had this happen to me where I did collect and keep all purchase slips, but, upon presentation at the airport to reclaim the sales tax, I was informed that the invoices weren't itemized correctly and, hence, useless. So, moral of the story, before you leave the airport upon arrival in Europe, ask what steps one needs to take to reclaim VAT and what needs to be on the receipts to validate claims. Because, if they can wriggle out of their obligation to refund, due to a minor technicality, they will. Especially when they know that you are not in a position to go back and have the error corrected as your flight home is leaving in an hour.
Cheers
Rapunzel