First the letter was posted by registered mail from the ÖVEBRIA 2018 Exhibition (Klagenfurt, Austria) to Moscow. Then the letter was delivered to the International Space Station by the Russian "Progress MS-09” spacecraft. To document the delivery, on board the station, the letter was marked with all proper board seals including the Russian official “Russian Post. ISS. Russian Segment” round board post mark dated 10 July 2018, the day when the “Progress MS-09” spacecraft docked with the ISS.

On November 19, 2018, the American "Cygnus” (CRS NG-10 “S.S. John Young”) private unmanned supply spacecraft was docked to the International Space Station (ISS). The Cygnus spacecraft was grappled by a robotic arm operated by astronauts inside the space station at 10:28 UTC. The cargo spacecraft was docked to the station’s "Unity” module at 12:33 UTC. The spacecraft delivered about 3400 kilograms of supplies to the Space Station. It was the 10th docking of a "Cygnus” spacecraft with the ISS.