I have a habit of not filing income tax until my 3 years is up. This has backfired on me this year, I can't find any W2 information for 2003. Nada, nothing, not even an envelope. I *know* I put them with other paperwork in one of my plastic folders and that particular folder has gotten some legs and run for the hills.
On the upside, I did find my birth certificate. Not that I needed it any longer since I quit the job. They wouldn't take my expired passport since it was in my maiden name, funny - no other job has refused it.