I'm with Santander and I have no idea how they work. If you have an overdraft, you're charged ?1 per day that you are overdrawn with my type of account I think, but if you don't have an overdraft, then I assume a bigger charge, which is my worry, as I can't afford this preorder, never mind charges
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EDIT: Also, somehow my bank have NEVER rejected a payment for me, even if I have no money in my account :/ And if they do reject a payment, you get charged for it
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