Did you ask the support for help?
Maybe it is an official card and the user forgot to write the ID 
https://www.postcrossing.com/receive/unknown
And please edit your post - it is not allowed to make the back of card public.
1 Like
Ho sorry .thanks for remind me. I will edit it
Maybe ask on the Russian language part of the forum as well ? (for such a question you can of course use English)
Good luck with your quest ! 
Ho great advice!! I will try! Thanks
1 Like
I asked my friends (their nicknames - Pooha and Natali21077), but it’s not from them, sorry!
1 Like
thanks a lot!!! It’s really helpful to me!
1 Like