I've no idea what his plans are but there's no requirement for him to have any supposed 'authority' accredit his achievement.
In the days of GPS, Strava and all, everyone can see what he has done and can either believe it or not - which is also the case if he had UMCA, Guinness or anyone else on board. Personally, if I thought he had ridden the miles, I would regard it as being the record without any such stamp of approval.