AS far as I'm concerned if it wasn't signed for, you aren't responsible. This happened when I built a house. The builder put in a jetted tub and I only asked for a soaker tub. They threatened to remove the jetted tub. I said I was fine with that as long as it didn't impact my move in date. They then let it slide.
Also at work we have client's that request on site changes all the time. We will not do them until a change order is signed. We've been burned by that before.
"if you disagree with my views are cannot adequately my criticism then ignore my posts." - Nusc