Yes credid cards info can be saved in your dominos app, and pay right from it. When you place an order through the app, a 'pending' charge goes out to the card to make sure you can cover it, so even prepaid cards work. When the food arives you can add onto the reciept any tip you would like, and sign the reciept, when the driver goes back to the store is when you are actually charged for what you write on the reciept. Bank debit cards for checking accounts also work that way.
Yes you can
Yes, Domino's accepts all major credit cards.
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