This is likely to be a scan of a fake or fabricated visa.
Just when you think everything is going smoothly, there is a last minute problem and they will request you to urgently send them some money, without which it will be impossible for them to make their trip.
Such operations have been known to hire young Russian women to act as the voice on the other end of that romantic phone call.
After taking the time to get to know you, she says she's coming to visit you or wants to move to your country.
A scammer could be a man or woman operating solo, posing as an attractive young lady, or part of an organized scamming operation.
At this point she will set the victim up as her knight in shining armor, the only one who can help her.
She might just need money to pay her bills but will probably want desperately to come and visit him in his Western nation.
This is another common scam used by Russian scammers.
A Russian woman will start interacting you but tell you she cannot speak or understand English.