who to contact about reducing paper waste in employee communications?

I received a tax form in the mail today from Mayo and when I opened it up there was the tax form itself and a second sheet of paper that was completely blank except for my name and address. That was literally the only thing on the whole piece of paper! It was there so that the name and address would show through a plastic window in the envelope. But my concern is this: with 76,000 employees, Mayo is sending one of these to EVERY employee... that's 76,000 completely useless pieces of paper being sent every year, just in this one mailer! Not to mention the 76,000 little pieces of plastic that make up the envelope window. Why not just print the name and address on the front of the envelope!! I'm not sure who to contact to make this suggestion. Any ideas?