When you speak to someone, after identifying yourself, just ask them to also email you a record of your holdings. That will then serve as proof that the ownership of your shares are now known and the shares cannot be classified as unclaimed.
Re - the W8BEN form, no urgency unless/when you decide to sell them.
BTA Price at posting:
57.0¢ Sentiment: Hold Disclosure: Held
HotCopper & The Market Online will be live From the Floor at the Mining News Select Conference and we want to bring the voice of our online audience to the show with us.