Thanks to all who replied with help on this thread, wanted to give a follow up. Our friend decided to have her brother drive her the 7 hours to Moscow to pick up the documents rather than write the letter. Maybe she was reluctant to write something and have it not be right. At any rate she went last week and she did get her visa she is all set to visit us, we sent her the ticket information and in 2 weeks we will be seeing her, and will have her here for 2 months. We are thrilled and so is she. It has been 4 years since we have seen her and since she is due to be married soon, this may be her last trip. Bless you all for your help.
nice news, wish her well from FReeps