Our objective was to evaluate U.S. Postal Service controls for assessing postage on underpaid packages entered using the Electronic Verification System (eVS). The Postal Service provides several ways for commercial parcel mailers (commercial mailers) to print postage and transmit shipping and payment information to the Postal Service. One option is the eVS, which allows commercial mailers to print postage labels and electronically transmit manifests with detailed shipping and payment information to the Postal Service. Other options include Click-N-Ship for Business, Permit Imprint, and PC Postage. Mailers choose the option that best fits their business needs.

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