Postal Service™ new prices and fees become effective at 12:01 a.m., Sunday, January 22, 2017. All Post Offices™, postal retail units, and contract postal units (CPUs) must ensure that all daily financial reports are transmitted by close of business Saturday, January 21, 2017. CPUs must coordinate the logistics to ensure that all daily financial reports are submitted to the host Post Office by close of business Saturday, January 21, 2017.
Post Offices and postal retail units with RSS/e1412 systems will receive the new software for the price change via a download over the network before they open for business Sunday, January 22, 2017, or Monday, January 23, 2017.
The new price change fees will affect all annual mailing fees, accounting fees, and Post Office Box/Caller Service fees. As of Sunday, January 22, all daily financial reports must contain the new fees. If a payment for an annual mailing fee, accounting fee, or Post Office Box/Caller Service fee is mailed (postmarked) before Sunday, January 22, with the old fees, accept the lower fee amount and process the transaction as follows:
Note: Do not process payments that are mailed after Sunday, January 22, 2017, with the old fees; return the payment to the sender.
— Revenue and Field Accounting,
Controller, 1-19-17