Originally Posted by Jan in VA

1. Use 100% cotton fabric.
2. Use Pigma pens in 05 size. (This is going to be a problem for you with blocks going all over the US. Maybe having them sign in pencil with you writing over that signature with a Pigma pen will solve the problem.)
3. Back the signature are of the fabric with a piece of ironed on freezer paper (from Reynold's, in the grocery store); This stabilizes the area for the pen, and can be peeled off after the blocks are signed.
4. Press the signature blocks with a dry iron before you wash the finished quilt.

Jan in VA