A spokesman for the three Labour MPs who are facing criminal charges over their expense claims said:
We totally refute any charges that we have committed an offence and we will defend our position robustly.
The key to refutation is proof. When you refute something, you prove that the allegation or opinon is false. It is not the same as simply asserting your innocence.
They should have said that they denied the charges. Whether they can be refuted depends on the decision of the court (if it ever gets that far).
Honestly, educational standards these days!