On one demand letter which the company received from revenue it stated that if payment wasnt made there was three options open to them one of which was collection of moneys owed from third parties. My partner used this as a threat in collecting this week and received 2000 from one person who was owing 8000, at least its a start. The rev is a law onto themselves.I have tried to get money back that was over paid to rev in 01 and 02 but they say once its outside four years you cannot claim however they can go back on you for ten years for taxex unpaid, how fair is that!