As well as photographing alternative layouts of blocks to help in a final decision, I also take a few photos of the finished top when I am sending it away to be quilted. I am a pessimist with the postal system, although they haven't lost a quilt yet, and I figure it would be easier to show a photo of a missing item rather than describing it. (There have also been a few posts here about missing quilts and the comment is often "unfortunately I don't have a photo")