My previously Citibank Visa plus debit account, which had been transitioned into a nab account , was cancelled with no notice received by me.
It's possible mail was stolen or I missed a call (which I would have ignored) but I think it was a pretty poor effort (if there was any effort at all) to retain me as a customer.
In fairness, I hadn't used the card since initially activating it, but that was the purpose of an infrequently used backup travel account. If I knew they were going to cancel it, I might have thrown a transaction or two on it, but ah well.