To add a card simply tap “Settle” in the upper left corner. Click "Link your card" and follow the instructions. Once you manually enter the card information, your card will be verified by a small authorization transaction to ensure the card is valid. We use 3D Secure to ensure your card data is accurate and safe.
Once your card is added, you can set it as the default funding source. If you do that, we will select this account or card for new payments. Also, you can change this at any time.