The Universal Postal Union (UPU) has introduced the newest model of the International Reply Coupon (IRC): The Doha model — so named for the 25th Universal Postal Congress that took place in Doha, Qatar in October 2012 — will replace the current model, known as the Nairobi model. Although the US Postal Service (USPS) no longer sells IRCs, they are still available in other countries and post of…
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