Carbon tax repeal statements for HorizonPower (1), and electricity (2) and gas (3) for Origin, check with your energy provider for theirs.

(1) http://www.horizonpower.com.au/images-corporate/2014-08-18_Carbon_tax_removal_substantiation_statement_-_Section_60FD.pdf
(2) http://www.originenergy.com.au/files/ELEC-RESSMESS.pdf
(3) http://www.originenergy.com.au/files/GasRESMESS.pdf