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How to know when pallets are required to be made when doing Full Service IMb (Intelligent Mail Barcode) mailings in MailStream Plus

A lot of questions have came up about this over the years.  The USPS finally put out a one-page information sheet.  It is located here-
https://ribbs.usps.gov/intelligentmail/documents/tech_guides/FullServicePalletizationFactSheet.pdf

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(Screenshot and URL as of 2016-03-08)
For additional questions about when palletization is required, mailers may want to contact their USPS Acceptance Clerk.

 
UPDATED:  August 8, 2017