Don't get caught - "International Catalogue of Trademarks"

A client recently sent me a document he had been sent by the so-called International Catalogue of Trademarks. 

It was in the form of an invoice, clearly based on a recently filed trade mark application with IP Australia, and asked him to pay AUD$1,850 for "registration costs" to an account in Hungary.

What is it?

It's a scam. The document is obviously created as a result of the scam operator monitoring the public trade mark application register. It promises a "listing in the TM-Edition 2012". If that exists (which I doubt), it will such a worthless "thing" (because it doesn't specify if it is paper or electronic) that it is a waste of time, much less money.

Don't do business with them.