I assume you are GG. I have no idea about 13 could be a letter from your father and friends proving that they know about the engagement. Number 14 is a letter explaining in detail why and when every divorce you have occurred. Number 15 would most likely be what is normally called an EOR letter ( Evolution of Relationship Letter) (just a brief outline of how, when and where you and her first met and how you two decided to get married.) When submitting the I-129F you should have submitted a letter of intent also, if you submitted it already a new updated one never hurts. 6 months pay slips and 1 tax return is not really a lot of evidence, you need to submit a letter of employment (if possible) 6-months minimum pay slips, 2-3 years tax returns and bank statements are good also. Has she went for her interview already? If she has and was given a blue slip, the slip will explain all documents she needs to gather and how much time she has to respond to their requests. If she has not went to her interview yet, then she needs to talk with someone who has actually been through the interview to help her relax and prepare for it. Send me a pm if you have any questions. Number 15 could also mean if you have ever applied for a fiancee visa before you need to explain when, who for and what happened. Good Luck, Robert