A Russian woman does not even consider the two of you to be in a "real" relationship until you have met in person! It is just not smart and sets you up for trouble (and makes the ladies think it is easy and encourages more of the same behavior). Not being prepared to visit: You did know that in order to bring her over here as a fiancee, you must visit her, in her country?
And this does not even include all of the unexpected experiences I have had with the women themselves!
I do not care how many letters you have exchanged or how many phone calls you have made, once you see her in person, things will change.
We all want to believe in love at first sight, but many times you look at someone and she looks at you and you know immediately it is just not going to work. Then you need to educate yourself on other ways of contacting your woman.
Sure, sometimes it goes perfectly, but will you gamble 3-4 months of your life and several thousand dollars on a trip to Russia just to find that out!? Not doing your proper research: By this I mean finding an honest and reliable dating or marriage agency, finding out all you can about your woman, learning about the geography, history, culture and language of the country she is from. This will continue to ensure that your agency is honest, and that you are indeed writing to a real woman!
You must be ready and prepared to visit her at some point in the future.
It has been my observation (by watching and talking with both western men and ukranian women) that a woman will generally give you about 6 months to decide you will visit.
For more details on the visa and immigration process consult your local immigration agency in your own country.
Honestly, though, a ukrainian woman, if she is serious, will want to meet you.
Most guys who are involved in this process (statistically speaking) are in their mid-upper 40'sand most of the ladies are in their mid-upper 20's. She probably does, but you need to be in contact with several women at any given time. Without doing your research you are just placing your bets (paying your money) and taking your chances. Sending her the wrong photos: You do not need to send her photos of your house, car or other prized possession.
If you do, I guarantee you will attract the wrong type of woman.
Writing/dating only one woman at a time is a bad idea.