Who doesn’t like to save money?
If you spend at least 175 Euros in the same store on the same day, you can get the VAT (Value Added Tax) back. When you are paying, be sure to tell the cashier that you would like to claim the tax so you will need the necessary form. Some stores, like Galeries Lafayette require you to go to a different floor where they have a booth that deals just with refunds.
Thanks to technology, the store will give you a customs receipt with a bar code as well as an envelope. It is now much easier to submit the form and get money back.
Now, all you have to do is go to the Tax Refund booth at the airport. (In this case, it is more reliable to go to the one BEFORE you enter customs) and have a machine scan the bar code. The machine will tell you if all is OK and if it is, you just have to put the receipt in the envelope and deposit it in the quasi-mailbox located beside the Tax Refund booth. This mailbox is only for tax refunds. Now you just have to wait up to three months for the refund on your credit card (or depending how you paid, it might also be a cheque).