1. The Intelligent Mail Package Barcode (IMpb) is required on all commercial packages as of January 26, 2014.  The mailer or mailing agent is required to submit a supporting electronic documentation or Shipping Services File (SSF) including piece level address or zip+4 Code information with each mailing.  If the mailer does ot provide both the IMpb barcode and the SSF they will be charged a $0.20 surcharge per piece.  For exceptions to this rule go to: https://ribbs.usps.gov/intelligentmail_package/documents/tech_guides/IMpbCertifiedSolutionsProviders.pdf
  2. All packages will be required to use the IMpb on January 25, 2015.  This includes Bound Printed Matter, Library Mail, Media Mail, and Merchandise Return Service (MRS).