Payments

If you are travelling to a sensitive location, don't pay by credit/debit card or take money from a cash machine.
If you need to spend cash when travelling to/working around a sensitive location, do not spend the notes taken directly from the cash machine (their sequential numbers may be logged). Keep a supply of notes received as change elsewhere and use those.
If you need to buy something when travelling to/working around a sensitive location, do not give any loyalty cards or personalised money-off tokens as part of your purchases - they are traceable.