I always sign my labels even if they are printed on the computer. We rarely sign anything now-- cards and checks are all I sign. So in 100 years what will we sign? My quilts will all have my name printed and then signed in my handwriting.
My label always includes the name of the quilt, then "sewed and quilted by:"
my name and my signature,
my county and state and USA,
and the date it was finished.