I have implemented an improvement to our olllld banking code (which needs a refactor since it's not up to the times). It's a stop gap until we refactor banking in general. This fix makes it so when you vend a new cred chip, you have the option of disabling all other cred chips linked to your account.
So if your cred chip gets stolen, you won't be unable to prevent someone stealing from your account forever. Previously, even closing and reopening your account wouldn't prevent this.
If you do happen to have a cred chip that doesn't belong to you, and have had it for a bit, and still have access to the account, please xhelp to confirm you should still be using it.