Decorate a plain orange favor bag with a decorative border using stamps and stickers.
Slip a piece of paper with the party details inside; use the "bring your bag to collect some treats" template so guests will know to bring their bag to the party. Place the flattened bag into a cellophane envelope.
Remove the protective backing and seal the bag.
Download the mailing-labels template and print them onto adhesive paper; affix a Halloween mailing label.
Stamp the invitations and send them to your invitees.
At the end of the party, fill the bag with candy to turn the invitation into a great Halloween party favor.