To add a credit or debit card to your Parking.sg account, simply follow these steps:

1. Open the Parking.sg app and log in with your registered account details or create a new account.
2. Tap the menu icon in the top left-hand corner of the screen and select "Add Card"

3. Enter your cardholder name, card number, expiration date, and CVV/security code.

4. Review the information you entered for accuracy and then submit. If you have already added a card, you can only use one card at a time.

Find the steps to change your card here