5 Dollars Silver Certificate, Yellow Seal - North Africa

The yellow seal on this note was a deliberate military security measure. When Allied forces landed in North Africa in November 1942, Washington needed a way to limit financial exposure if large quantities of currency fell into Axis hands — a standard blue or green seal note would be indistinguishable from domestic circulation and impossible to demonetize quickly. The yellow seal allowed the Treasury to repudiate the entire series at short notice without affecting stateside currency.

The same logic was applied to the concurrent Hawaii overprint issues in the Pacific theater. Both series were declared legal tender for troops but could be declared worthless by proclamation within hours.