I purchased a ring in Italy and the store offered to deduct the VAT on the spot. I was given a government form and told to obtain a customs stamp at my last European airport, otherwise my credit card would be billed the VAT deducted. I did this at the customs office in the Frankfort airport and followed their instructions to drop the form in the mailbox on site. However, upon my return to Canada, my visa card has been charged for the VAT with a note saying "no stamp"! I don't have any proof that I received the stamp and that the form was mailed. Any suggestions???