burn\shred them. i'm getting tons of them each year. and it sucks,because they have all the info in it. enough to f** you up on identity theft FOREVER. SS and address-that's all thief need. what even more disturbing is that if you have account with someone from overseas-they send those K1 to them too. again-it's and invitation for disaster. and waste of money and paper. there should be an option to deliver them to the customer securely via internet BY CUSTOMER REQUEST. not just pissing them all over the world with my credentials in it. IB! you should stop this madness.