How long is a postal money order good for?

Answer 1

Domestic money orders are paid regardless of the time passed since their issue. Money orders are not interest-bearing instruments; they are paid only in the exact amount imprinted up to the authorized maximum amount. USPS records serve as the basis for adjudicating claims for payment of money orders. From Domestic Mail Manual 503 http://pe.usps.gov/text/dmm300/503.htm#wp1150680