Keeping an original will safe and secure is one thing, (see storing a will), but as a practical matter, it is important to let executors know, or family or a trusted friend, of its whereabouts.
But what if for some reason an original will cannot be located, despite thorough searches? Some additional enquiries which may be made in finding a missing will is discussed here. If a deceased person has not left a valid will, the intestacy rules apply. More