Notice of sale to owner

If the address of the owner of the goods has been stated on the manifest of the cargo or in any of the documents which have come into the hands of the Board, or is otherwise known, notice shall also be given to the owner of the goods by registered letter; but the title of a bona fide purchaser of such goods shall not be invalidated by reason of the omission to send the notice hereinbefore mentioned, nor shall any such purchaser be bound to inquire whether such notice has been sent.