Log in to https://app.wipperoz.com/en
Click "My Wips > Wips Dashboard" from the grey dropdown menu on the left.
On the right, you will see your active Wips. If your Supplier has requested the payment, you will see a "Pay" button.
Once you press the "Pay" button, you will be redirected to the Stripe check out web page. You must fill this page with the form of payment you will use. Then, click "Pay" blue button.
You will be redirected back to the "Wips Dashboard" page where you will be able to see your Wip payment status as paid. Depending on the payment mean, it can take up to 7 working days to reflect the new status.