What do you have to do to get it?? Very simple, you only have to buy a gift voucher of €25 before the next December 17, 2017, and at the end of your purchase you will get an email with your promo code with which you get a discount of €5 in your next purchase.
The terms of this promotional code are only to purchase products that are sold and shipped by Amazon, and the check you receive will have to be redeemed before January 30, 2018.
Oh, it's also important to note that this promo code, with which you get €5 discount, is not cumulative to other offers, you can only use it only once.
You also have to know that this promo code is associated with your account, so you can't transfer it to another account. That is to say, the promo code will only be applied if you make the purchase from your Amazon account.
As you can see, simpler impossible, so, if you're interested in making a gift with Amazon gift checks, take advantage of this promotion, and so you get a descuentillo.