The refunding of myPrint credit is only possible when closing a myPrint account.
The full remaining credit will be refunded, it's not possible to request a part of your remaining credit.
The only condition is to have an European bank account.
Refund requests are handled by the financial department once per month.
If you wish to use myPrint and the studentprinters at a later time, you just login to myPrint again and your account will be recreated with a credit of 0 euro.