[pw0nka]

I'm not an attorney, so I can't give you the exact references to laws. Basically you are not obligated to store those documents as a private person, as long as you don't need to show them to a judge during a court case. That's why I'm a bit on the paranoid side, because you never know when you might need a specific document to prove something. In my case I do store all the documents which were signed (e.g. contracts) or are government related.