You put so much into those quilts, you shouldn't have to send a stamped self addressed envelope to them. They should have some class and write a thank you note right away. You can do delivery confirmation, but that doesn't tell you that they appreciate the gifts. They should tell you themselves. A handmade (machine sewed included) quilt deserves recognition immediately. I've had to call people and ask them if they have received their quilts, just to get a thank you or a "I love it" from them. Times have changed. We know the value of our quilts. It seems that other people should know the value of our quilts. One look at them and they have to know we put ourselves into them. I would send my quilts elsewhere, where they are appreciated immediately.