Some reasons for the rejection of physical-proof refunds include:
Missing address.
Missing entire envelope or package.
The postage label was removed from its packaging material.
Missing label.
The label had already been mailed. MORE… The postage print has a USPS date stamp imprint on the label, indicating it was used to mail a package.
Photocopy of label. MORE… The original label is required.
The postage item was never requested successfully for a refund through endicia.com.
The required refund request form was not printed and included with the postage prints.
The submitted piece count quantity must match the quantity that was requested.
The date of the indicium is over the 90-day limit. MORE… The labels do expire.
Unscannable: double printed.
Unscannable: no barcode.
Unscannable: printing over the barcode.
Unscannable: partial barcode.
Unscannable: smudged.
Unscannable: too faded.
TIP: Endicia does not scan USPS Tracking labels. You should submit refund requests for USPS Tracking electronically, or else you will lose the value of the postage for that mailpiece.
