[bitdiddle]

This last suggestion is illegal. Lawyers generally counsel to not say much in email because email is subject to discovery in legal proceedings. Many laws also require retention policies that are subject to audit, which makes shredding problematic.

[ghshephard]

You clearly don't work in Silicon Valley. Every building has dozens of Garbage Cans marked "Shred" - The default for anything on your desk is to toss it into one of those.

Nobody (except for HR, Finance and legal) keeps paper files anymore, so if you don't want a permanent record - just deliver it on paper and it will disappear. I've been through several discovery procedures, and all that anybody has ever been interested in was email. Nobody even _thought_ to ask for paper files.