A mint can simply not redeem a token, based on any number of heuristics

And if you're worried about your account getting nuked maybe you shouldn't be using that custodian

ECash is nothing a database account isn't, it's not any more permission-less, or private, or asynchronous, it's literally a server authentication scheme. Transferring it offline is effectively writing down your password for someone. 

... claiming it's more than that is being done intentionally by the central influencer agency to astroturf new banknotes being pushed by the government