According to "Stamp Magazine" from 18 February 2012 Post Offices in the UK no longer sell International Reply Coupons.These were once the universal "currency" of DXers chasing QSLs. (via BDXC-UK)
An International Reply Coupon (IRC) is a device by which a person in one member country of the Universal Postal Union (UPU) can prepay the return airmail postage cost of a letter of a specific maximum weight from a different UPU member country. At the time of writing and in theory at least, IRCs are exchangeable in all countries with the exception of Taiwan. UPU member countries may decide not to sell IRCs, (notably the Netherlands and Sweden, amongst others) but their exchange is compulsory in all countries. (More details at http://www.g3swh.org.uk/irc.html and the UPU website Via Mike Terry in dxld)
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