You have a bad landlord. If he won't show you the documents, he's scamming you.
I'd say either that or just a lazy (or possibly) forgetful bum, who needs to get their rear in gear in doing their job properly
Personally, I wouldn't want to risk shooting myself in the foot. But then I've had a housing manager before who couldn't seem to remember month-to-month that the grey stains on the floor of our ancient shower would not
come off until we'd scrubbed them twice (with threat of being charged a fee over it), followed by her scrubbing it and realizing it was a stain and not lazy tenants. ::sigh::
In your situation, I'd probably be the person hounding the super each day until I got that letter.