Simply log into your Sniip account and remove that card from your Payment Methods.
To find your Payment Methods, tap on the menu in the top left corner and tap ‘Payment Methods’.
In the Payment Methods screen, tap the blue ‘Edit’ icon at the bottom of the screen, tap the ‘Trash’ icon in the top right corner of the screen.
You will be prompted to remove the payment method from your wallet, removing the card permanently from the Sniip app and system.