Mail Processing Deadline
Have your mail ready for processing at Printing and Distribution by 3pm. All US mail is processed the same day it is received, but note that mail received after 3pm can not be guaranteed for discounted postage.
Addressing
Use proportional fonts such as Courier, and all capital letters for the mailing address, with no punctuation. Example:
JOHN DOE CITY OF PORTLAND 1120 SW FIFTH AVE SUITE 1616 PORTLAND OR 97204
Construction
Address must be at least 5/8ths of an inch from, and parallel with, the bottom of the mailing piece. Avoid staples, and excessive use of graphics on the address face.
Paper Selection
Self-mailer single sheets should use 70lb paper. Multiple sheets should be 70lb bond for the first sheet and 20lb bond for the remainder. Use white or lightly colored paper. Tab it shut on the top with the fold on the bottom.
Ancillary Service Endorsements
(US Postal Service "Quick service guide" document)