Great question! 

You can have up to five credit or visa debit cards total for your Neon account.

• To change your card details, head to your My Account.
• Enter your password to verify that you are authorised to make changes.
• Head to the 'Subscription and Payment' section of the 'My Account' menu.
• Scroll to the 'Payment Details' section.
• To add a card, click the '+' icon next to 'Add'.
• To remove a card, click the 'x' next to the card you wish to remove.
• To change the default card set for your monthly subscription, check the box next to the desired card under the 'Plan Payments' column.
• To change the default card set for Rentals, check the box next to the desired card under the 'Rentals' column.
• To update card details, select the pencil icon next to the desired card under the 'Edit' column.
• Click 'Save' once you're done!