Angry women's groups said last night that it would be the children at the centre of the disputes who would suffer most if money were paid back.

In each case the duped men were able to prove beyond doubt in the courts they were not the fathers using DNA paternity testing.

In the biggest case, Queensland man Ken Rodgers obtained orders for the repayment of $60,000 after making child support contributions over a decade to a woman who refused to even send him a photograph of his alleged child.

Making mothers pay back child support was last night condemned by women's groups.