When you buy a gift voucher from Brouwland, you can find it under "My vouchers". You can download it and see the (remaining) balance. The gift voucher will remain there until it has been used up by you, or until you pass it on to someone else and they use it for the first time. The gift voucher will then change ownership.
If you've been lucky enough to receive a Brouwland gift voucher, you will see the (remaining) amount when you add the gift voucher code to your shopping basket. Once you use a gift voucher for the first time in an order, you will also find it in your account under "My vouchers" unless / until it has been used up.