A number of years ago my mum's golf club received a letter of demand from one of those international telex directory people. ie pay up or we'll take you to court.
The club secretary had mistakenly agreed to an entry thinking it was a recurring bill - dodgy as hell
Anyway I drafted a response essentially suggesting that the local courts were in Adelaide and we were sure that the various Australian Authorities would be very happy if the firm instituted action and thereby agreeing to submit to Australian Jurisdiction.
The golf club never heard another word.