Accomplices: The scam is often perpetrated by Nigerian male students living and working / studying in Russia.
The "advanced fee" part of the scam is lifted straight from the typical Nigerian "get rich fast" scam playbook. They impersonate the ladies rather than work for them.
Private investigator will likely confirm most of the information the girl provided you about herself (name, address, family members, etc).
When ready to strike, she may send you to jail on fabricated claims of domestic or sexual abuse, she may also try to empty your bank account, clean out your home of all valuables, and get a big settlement during the divorce.
Her phone won't stop ringing and she always goes to the bathroom to answer it, she keeps SMS-messaging someone constantly, she bring her girlfriends to every meeting so you do not have a chance to be intimate, takes you on long shopping trips where you are asked to guy presents for her and her girlfriends, and toward the end of your trip she tends to disappear for hours and days, leaving you to figure out on your own the ways to get around a foreign city.
If you find yourself in this situation: 1) avoid giving her money; 2) keep an eye on valuables such as laptops, cameras, credit cards; 3) refuse the shopping trips and expensive restaurant dinners - at this point, you can forget about hope of building the relationship and just concentrate on cutting your losses.
Often, at the time of his arrival for the meeting hopeful Romeo will be informed that his lady had an unexpected family emergency and cannot attend the meeting.
He will be offered a list of other, not quite as model-quality looking girls who are available to meet at the moment.