Liberal National MP and opponent of same-sex marriage George Christensen used taxpayer funding to print ads on behalf of the Coalition For Marriage, the group leading the "no" campaign during last year's postal survey on same-sex marriage.

There was no official funding allocated to the "yes" and "no" campaigns by the government for the postal survey on whether same-sex couples should be allowed to marry, but politicians said last year they intended to bill taxpayers for printing and other costs associated with promoting their point of view.

Under parliamentary entitlements, Australia's elected representatives are allowed to spend up to $160,000 per year on printing and communications.