The tax administration obliges us to store a copy of your passport to prove that you are a non-EU resident and that you are eligible for a VAT refund. Without the copy of your passport we are not allowed to send the store a request for payment of your VAT refund.
After we have received and checked the copy of your passport we are allowed to proceed with your VAT refund request.
You can read about how to safely share a copy of your passport here.
Please note; if you have a EU passport, you are also required to provide a copy of your visa or residence permit for the non-EU country you are living in.