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Shirley, if they are taking money from my bank account, it should show up as a transaction on my bank statement. No?
All your touches just record where you’ve been. Overnight TfL analyses them and charges you once for all of the previous day’s journeys. The money is distributed onwards to train companies via arcane formulae and algorithms.
But you can use the TfL website to check its recorded your journeys correctly and what you’ve been charged for each one. Even if you’ve not used any TfL services.
I believe C2C
They already do for stations just outside London. It’ll be expanding to all of their rail stations soon.
still think there's an upper daily limit
If you use the same debit card for all your journeys you’ll never be charged more than the price of the equivalent day travelcard for one day’s travel. And never more than the price of a weekly travelcard for a whole week’s travel.
(It is, of course, more complicated than that)