Point taken, I am not well educated in the principles of owning a plane.
Would the insurance company not need proof of the hours, ie. photo copy of said pilots logbook, or a copy of his licence saying he is endorsed to fly that particular type?
Seems too easy for the owner to go down this route and then just use the excuse that, 'the pilot told me he had 20 hours on type' as his defence in the event of a claim?