Look yes its written in stone (the US Consitution) as to what the requirement is. However there is no requirement to actually produce documentation that one is indeed elgible for the Presidency.
Again the honor system worked up until this election cycle....
There must be some sort of law saying that if you knowingly represent yourself as something and then take money (500m) for it, but are not that something it is illegal for you along with your co-conspirators.