All of your stored cards are accessible through the MAF Carrefour App when you're using it. A card can be added or removed by selecting More and then Saved Cards. If you like, you can select a card from your stored ones on the application or add a new one when you select City+. Keep in mind that as you leave the business, City+ will immediately charge the entire amount to your default card. So, if you've stored more than one card in your application, do not even forget to choose the card you wish to use for payments as the Default Card in your list of stored cards.