I place a label on the back of each quilt, ex:
To Kylie
Happy 6th birthday
Made with love
By
Aunt Theresa
Nov 23,2010
Or I may say
Pieced and quilted
By Theresa R
November 2010
I use photo fabric paper and print label from computer, and hand stitch to back of quilt. There are many ways to label and some put on much more info on label then I do.