AMD has running a cashback promotion in some european states. If you bought an AMD FX processor in Austria, Finland, France, Germany, Greece, Italy, Netherlands, Norway, Portugal, Sweden or the UK from one of the partnered e-tailers, you can get back between 10€ and 20€, depending on the number of cores of your processor.
You will find all the deal details on the AMD promotion webpage. The promotion is running until the end of the month.