Ensure you have verified Wirex account
Wirex verification is easy and only requires 2 documents. Read here for submission guidelines and steps.
Select the correct ‘Add Funds’ option availablefor  Germany
Log into your account, select ‘Add Funds’ then click ‘Alternative Payments’. Next, under ‘Select Service’, pick ‘GiroPay’. Wirex will not charge for this service; however you will incur a small fee of 3.00% through GiroPay to use their platform.
Make a payment from GiroPay
You will be directed to a GiroPay page. Follow the instructions to send a payment to your card account. Upon successful payment, the funds will be reflected within moments in your Wirex card balance. Success — you have used GiroPay to add funds to your card!