Yes, you can delete a card and add a new one to your Bluedot account. To delete a card, go to the Add Money section of the Bluedot App and click on one of the connected cards that you connected. Then go to manage your cards to remove the card that you no longer want to use. To add a new card, go to the selected menu section and select "Add new card." Enter the new card information and follow the prompts to add it to your account.