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--- islandsintherift:finance [2020/06/02 23:13] – sam
+++ islandsintherift:finance [2020/06/02 23:20] – [Allowances] sam
@@ Line 40: / Line 40: @@
 They can then use the card according to the rules on it. For example, they might be allowed to withdraw Cr1,000 a month, so that's what they will be limited to.
-Before they leave the system, they 'sign-off' from the bank, and the bank updates the card. Then they can move to a different system and sign on there. If they fail to sign off, then the new system will not recognise them, in order to prevent withdrawing from multiple systems.
+A history of transactions is stored on the card, probably using some form of blockchain. This means you can't withdraw in one system, then go to a second system and withdraw there to avoid any limits - the card knows what you've done and where, and will upload that information to the new bank.