Hello :) author of the proposal here, if you have any question or comment feel free to ask!<p>Users that trust <a href="https://GreenAddress.it" rel="nofollow">https://GreenAddress.it</a> can check the instant confirmation inside their wallet (on a UI 'badge' similar to the N confirmations or unconfirmed).<p>While some platforms are interested in the instant confirmation some will take longer or won't.<p>For this reason and for external wallet users you can still manually check if a specific transaction is instant via <a href="https://greenaddress.it/instant" rel="nofollow">https://greenaddress.it/instant</a> provided that you are the recipient of the transaction and can prove it - and of course that you trust GreenAddress to not allow users to double spend.<p>The external instant confirmation link does not work for multisig or P2SH external addresses yet.<p>Link to the reddit discussion <a href="http://www.reddit.com/r/Bitcoin/comments/284me8/instant_confirmation_via_payment_protocol_bip70/" rel="nofollow">http://www.reddit.com/r/Bitcoin/comments/284me8/instant_conf...</a><p>Cheers!<p>Lawrence