I "sign" all of my quilts with the same symbol (a small spiral in the bottom right corner when I quilt it - DH came up with it), but only gift quilts get labels... I know my MIL has a BUNCH of quilts from past family members and can't remember who made which one which I think is kind of sad. It's like a part of history being lost. At least with my "signature" even if I don't have a label, if the information is passed down then they should be able to figure it out (assuming they are still around that long).