Not generally able to comment on the fiscal goings on at a brothel, I do understand some have EFTPOS facilities for those who want to pay in cash. Strange even that you would consider this outlet as normal on your monthly statement.
Thinking as a sensible pervert, one would imagine he would get cash from a hole in the wall to pay for services rendered such that it doesn't leave a paper trail.
To leave an uncovered paper trail points to arrogance, not stupidity.
EDIT to add, his "proof" has now evaporated into the ether with claims of being in Perth at the time "someone" "borrowed" his credit cards, licence, etc and replaced them.
I've seen better looks on Kiwi Ewe's with their heads stuck in the fence.