First Appeal
Online: To appeal a decision for a denied claim or partial payment that was originally submitted online, you must submit your appeal online at www.usps.com/domestic-claims.
By mail: To appeal a decision for a denied claim or partial payment that was originally submitted by mail, you must submit your appeal by mail. Include a copy of the denial letter. Submit your appeal to the following address:
DOMESTIC CLAIMS APPEALS
US POSTAL SERVICE
ACCOUNTING SERVICES
PO BOX 80141
ST. LOUIS MO 63180-0141