Since we cannot know in advance how much you are going to refuel, a certain amount of money is reserved in your account. Specifically, this means that an amount of €200 is temporarily blocked. This amount is more or less equal to the maximum amount that can be spent on a full refuelling session. When you have finished refuelling, the unused balance will be released immediately. Unfortunately, your bank may sometimes block the balance for a longer period of time, up to a maximum of 14 days. For the sake of clarity, this is not at Q8's request. Of course, blocking an amount does not mean that it will be debited from your account; it is only intended as a payment guarantee. For more information, please visit: http://www.mijnkaart.be/index/nl_BE/5631282/0000/Aan-de-pomp.htm.