The federal government's religious freedom review has rejected concerns that same-sex marriage could undermine religious freedom, saying there was scant evidence to support such claims.

Members of the public had presented very few original examples of perceived infringements on religious freedom during the investigation, according to the review panel's final report.

The finding is a direct rebuke of the "No" campaign's central claim that legalising same-sex marriage would unleash a chain of consequences for religious organisations and people of faith.

The Ruddock review was commissioned last year amid the debate over same-sex marriage. Credit:Alex Ellinghausen

"The panel received limited evidence that the fears of religious groups expressed during [the same-sex marriage] debate had come to pass in Australia, although it was also noted that the change had only recently been introduced," the review concluded.