1 Dollar Military Payment Certificate

Military Payment Certificates were introduced after World War II to address a persistent problem: U.S. servicemen spending dollars in occupied territories was fueling black markets and destabilizing local economies. MPCs could be periodically "converted" — entire series withdrawn on short notice, with personnel required to exchange their holdings on a single day. Anyone holding MPCs illegally, including local nationals barred from possessing them, lost everything. The conversion days were kept secret until they happened.

Series 521, which covers this note, was in use across Japan, Korea, and several Pacific postings during the mid-1950s. The BEP printed MPCs on the same security paper used for Federal Reserve notes, though the dimensions were intentionally reduced to prevent confusion with regular currency.