I pretty much put the same info PTquilts does. If the quilt is a special gift I will hand embroider that info, usually on a plain piece of fabric that I have embellished with applique or I use an orphan block (a test block I made for the quilt) and write the info on it using a micron pigma pen. I have made the label in pretty fonts on Word and traced it so I have something to follow when doing embroidery. My machine has a very basic block letter all in caps alphabet and I have used that as well. I have also used the fabric that is pre printed with labels and just written my info on it with a micron pigma pen which I then heat set. Labels can be as elaborate or as simple as you like but for historic purposes it is best practice to include your name, city, state and year of completion.