On November 21, 2012 on the official website of the State Space Agency of Ukraine there was a message:  "On November 19, 2012 in Kiev, in the State space agency of Ukraine opened the exhibition devoted to the 15th anniversary of flight in space of the first astronaut of Ukraine of Leonid Konstantinovich Kadenyuk onboard the American Colombia spaceship. Especially for the 15 anniversary of Leonid Konstantinovich Kadenyuk flight the entreprise "Ukrpochta's" was issued and canceled a memorable stamp".

According to the written petition of Space agency to "Ukrposhta's" guide our dear scientists very much would like to print memorable stamp to anniversary of flight of the first astronaut of Independent Ukraine and to make a postage cancel for carrying out special cancelation.  The image for this stamp was attached.  To refuse a request of so serious and significant organization it was represented inadmissible.

Thanks to "printing development in the West" and to technologies of "Photo stamp" any whim of dear customer is executed in short terms. As for a special cancel, the "Ukrposhta" was powerless there. To make a cancel within one day theoretically probably, but to be fooled by this problem nobody wanted. However, the Agency didn't insist on a cancel. The exhibition organizers bought some tens pure envelopes, stuck on them the ordered stamps and extinguished them own "cancel" - the office press "For documents". Such souvenirs for guests and participants of an exhibition were prepared by meeting organizers.

Spoiled there was practically all issue edition ordered by Agency in "Ukrposhta".  However, some copies of sheets of "unique space stamp" were rescued from barbarous intervention of "space Papuans".
E-shop "Ukrafil" is the only owner of the special postage issue devoted to anniversary of flight of the Ukrainian astronaut as a part of the international crew onboard the American spaceship.