CardUp will authenticate your American Express credit card with 3D Secure (3DS), which is a security measure that helps to prevent fraud in online card transactions.
If you have added an American Express credit card previously to your CardUp account before January 2020, we will request for you to enter your card details again and complete 3DS verification.
When selecting an American Express credit card with a new payment schedule from 2020 onwards, the 3DS verification process will be prompted.
You can complete this process by following these steps:
- Enter your card details and select ADD CARD
- You will be re-directed to the 3DS authentication page and asked to enter an OTP that is sent from your card-issuing bank
- After submitting your OTP, you will be directed back to the Schedule Payment page where you can continue with the setup of your payment
And done! Once your card has been successfully 3DS verified, this request will not be shown to you again in the future.