GSA Advantage!

Jan 02, 2011 · The PostalOne! system will support .pdr adjustments for Postage Affixed Standard Mail or First-Class Mail mailings when the .seg Class Defining Preparation is 1 (First-Class Mail) or 3 (Standard Mail) and the .mpa Postage Payment Method is S (Stamp), M (Metered: Neither), L (Metered: Lowest), or C (Metered: Correct). ................
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