PUBLIC LETTERBOX: This geocache hide is the Bonus that completes a series that includes Hybrid Letterboxes associated with U.S. Post Office Buildings. You must have completed all Letterboxes in this series to qualify for this Bonus. Each Letterbox has a Bonus Code Letter (alphabet). Unscramble the 11 Letters (alphabet) into your Keyword to validate in Certitude. (Note: If you found Letterboxes before Code Alphabets were added, you will be sent the Code, or please contact CO for the Code).
GCAHE2F Letterbox 98008 Bellevue
GCAJ86N Letterbox 98011 Bothell
GCAJ86F Letterbox 98025 Hobart
GCAJNBW Letterbox 98104 International District
GCAHQDE Letterbox 98033 Kirkland
GCAJ86R Letterbox 98039 Medina
GCAHH9C Letterbox 98040 Mercer Island
GCAHV5H Letterbox 98052 Redmond
GCAHT7F Letterbox 98057 Renton
GCAJ86H Letterbox 98188 Tukwila
GCAJ86Q Letterbox 98072 Woodinville
Final Coordinates for this Bonus are off a Public Trail a short distance away from Posted Coordinates.
BONUS BANNER FOR COMPLETERS: Once you have completed all Letterboxes, plus this Bonus, you may Edit your Geocaching.com Public Profile to post the Completion Bonus Banner by copying and pasting:
<img src="https://s3.amazonaws.com/gs-geo-images/7ff4d7a2-199b-4943-b7f8-f9f60334dfaa_l.jpg" height="350" width="325" </p>
The banner replicates a Forever Stamp.

Congratulations to FTFers DM&K Cachers and rakis2.
You can validate your puzzle solution with
certitude.