The Parliamentary Secretary to the Prime Minister says WA MP Don Randall has given an adequate explanation about his use of taxpayer money for travel.

The Liberal MP has confirmed he claimed more than $5000 to fly to Melbourne with his wife for an AFL game, before parliamentary sittings.

Mr Randall has also repaid more than $5000 he spent travelling to Cairns where he had an investment property. He maintains the travel was legitimate and says he has not done anything wrong.

Parliamentary Secretary Josh Frydenberg says there are grey areas in the entitlements system and he does not think Mr Randall needs to provide more information.

“No I don’t and Don Randall has spoken publicly about it,” he said.

“Some things are confidential and at the end of the day you’ve just got to trust those MPs, dare I say it, to use their good judgement and by and large MPs adhere to the rules of entitlement very well.”