I was not allowed to withdraw money from my own checking account today using what I though was the reasonable approach of handing a completed withdrawal slip to a teller. "This is from a checking account?," she asked. Humph. The teller was very friendly and helpful: she fetched and largely completed a bank check to cash in the same amount, and I was able to leave with the money I had requested. The ATM lets me withdraw from checking, though ... what gives?