(MONEY Magazine) – In New York City, the high-stepping Maud Frizon shoes pictured above will set you back $385 plus tax. Buy a similar pair in Paris, and you save more than $70. The secret? VAT, or value added tax, refunds -- the hefty 12% to 15% sales tax you can recoup on purchases in Europe. Until 1992's unification, such paybacks require paperwork at every border, but England, France, Ireland, Portugal, Scandinavia and West Germany make it relatively easy. Italy and Spain, by contrast, make it too complicated to bother. Here's a rundown: -- Though the name of the tax varies, you must usually spend a minimum amount to qualify for a refund. In England, it's often a painless 50 pounds ($85) per store. In France, it runs about $225. Before you buy, ask about the store's VAT policy. -- Keep all receipts, cash-back vouchers and refund forms. When leaving the country, get your forms stamped by customs and mail them in the envelope -- usually prepaid. -- If you can't get this done at the airport or terminal, have your paperwork stamped by U.S. Customs officers on your return home, or by any notary public. -- If you can, get the refund in cash -- U.S. dollars. Otherwise, ask that it be credited to your charge card.