I think it is more about getting the client's testimony confirming the deed. And you're right, prostitution is a business based on discretion, so most of the ti

I think it is more about getting the client's testimony confirming the deed. And you're right, prostitution is a business based on discretion, so most of the time prostitute would not know the name of her client. Bottom line is: they stopped taking a word for it and started demanding proofs.