At our store in Helsinki we are using Global Blue Tax refund
Global Blue Tax Free refund in 3 easy steps:
1. Shopping
When you're at the checkout, ask for the Global Refund Cheque.
2. Through customs
When leaving a country or the European Union, show your purchases, receipts and passport to customs officials and have your Global Refund Cheques export validated.
3. Refunding
Collect your refund in cash at the nearest Global Blue Cash Refund Office or send the cheque to Global Refund for a bank cheque to be sent to your address or direct crediting of your credit card.
Find more information here: https://www.globalblue.com/en