Here is a list of resources for you to use with your troop. These are free printable Girl Scout cookie thank you cards and tags. You can have the girls attach them to the boxes they sell and have them sign their first name only, or you can have them sign with the troop number.
Image from Canva
If you do not wish to print these from your own printer and use up all of your own ink,then I suggest going to your nearest Kinko's or Staples and printing them there. Save your receipt to be reimbursed.
Girl Scout Thank You cards and printables can be found:
Fashionable Moms Update 2019 free printables. Go to the Google Drive link to see them all
Troop Leader Mom Door hangers for people who are not home
MissyBalance (girls can color these in if you want)
Flickr.com ABC Bakers Thank You card page
Fashionable Moms Printable stickers to put on each box
Fashionable Moms Girl Scout Thank You certificates
Fashionable Moms Cookie Box Wrap
Mommy Snippets Bookmark thank yous
Get Smoore Printable Thank yous
Sowdering About Printable Door Hangers