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3 Extra Services - Postal Explorer - USPS
Jun 6, 2016 To obtain a certificate of mailing service for three or more pieces of eligible items (see 311.21), the mailer may use PS Form 3877 or a USPS-
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postal bulletin 22559 (11-19-20) - About USPS home
Nov 19, 2020 November is HAZMAT Awareness Month. To protect the health and safety of our employees and the general public, the Postal Service has
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312 Bulk Quantities Certificate of Mailing - Postal Explorer
312.1 Description. For bulk mailings of identical-weight pieces paid with ordinary stamps, meter stamps, PC Postage, or permit imprint, mailers may optionally
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