It's not just a question of AML law it's also a question of privacy laws etc here. A company that is required in case of AML/KYC laws etc to hold customer information, and bank accounts/recipts/statements are very much customer information, are in most civilized countries severely restricted in what they can and can't do with such information and suggesting that they post such on the internet is frankly kinda fail.
In Australia the rules are quite clear:
http://www.privacy.gov.au/materials/types/infosheets/view/6541#kWhat you're suggesting is in legal terms under AUS law the same as your bank suddenly deciding to post everything they have on you on the internet. Not really a smart move at all.
WME himself has already made the details public. So I guess he wouldn't mind giving authorization to make the receipt public as well.