When I worked in a refuge, we warned all new women coming in to the refuge to call their banks and change their addresses to the PO Box address of the refuge, and if they did not want to do that, not to use ‘hole in the wall’ cash dispensers. We experienced and heard of many women found by their abusers because they had used the cash dispensers, not even thinking that when their bank statements arrived in the post, their abuser would only have to look at where the money was taken out to get a pretty good idea of where they were! That was about as technical as it got back then!
We need to know this and a good deal more too. Well done for your clarity!