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I am new to crypto currencies and wondered if ones online wallet is hacked and coins stolen could the hacker make you go overdrawn by spending coins you don't have? Many thanks

marked as duplicate by alcio, pebwindkraft, Highly Irregular, Andrew Chow Nov 13 '17 at 1:37

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You can never spend more coins than a wallet controls, there is no 'overdrawing an account' in bitcoin. You either control the keys that can spend some coins, or you don't.

  • Many thanks is that the same for all crypto currencies – John Dean Nov 12 '17 at 9:29
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    There are a large number of cryptocurrencies out there, I do not know if that is the case for every single one of them. That said, if a cryptocurrency defines network consensus in the same way bitcoin does, then you cannot have a debt on an account. – chytrik Nov 12 '17 at 9:53
  • @chytrik is right, there is no way to have an overdrawn withdrawal on your account. – Hollossy Nov 12 '17 at 10:44

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