If you are submitting Your K1 Fiance Visa without an attorney, then there are few things you need to know.
Here is an important requirement for the applicant, before submitting the K1 Fiance Visa Application. You must have met your fiance within two years of submitting your K1 Visa Application. Say you met your fiance three years ago and decided to send in the application. You will be denied and will have to start over again. The best thing to do would be to take another trip out to see her. Then come back to the USA with updated travel docs and submit your application.
The USCIS officers are reviewing your application and looking for certain things. The trips ensure your relationship is current. These officers tend to not trust a long distance relationship that lacks face to face contact. As they see it, most normal relationships have personal contact and that contact is most acceptable when documented within two years of the submittal. To the USCIS officers, if you have not seen your fiance in two years, then something is not right. Not satisfying this requirement will definitely keep your application from being approved.
Typically you should have seen your fiance twice within this two year period. Once is good, but it really does not show a trend. Usually meeting only once does not show that your intentions are true. This is just my personal opinion but a lot can happen over three years of not seeing each other. That bond that you had with her, may not be there once you are ready to file. Best to keep that bond strong with meetings every 6 months and at the least once a year. But ultimately that decision is up to you or both of you.
Not all K1 Fiance couples are compatible. I have met many that are not. The worst part of it is they found this out after they were finally together in the USA. The comfort level was not there and they even had a hard time just trying to sleep with each other.
Personally I met my fiance every 4 - 6 months and spent a total of three weeks each time I flew out to see her. The first time was very uncomfortable. The second time it was better. The third time I knew she was the right one for me. It is tough to make these trips, but well worth it once your fiance is in the USA with you.
Make sure you hop a plane regularly and spend some time with your fiance. Here are the things you need to keep while on your travels. Hang on to your plane ticket stubs, hotel receipts, currency exchange receipts.
These are the exact items I collected from my travels. I kept plane ticket stubs, hotel receipts, currency exchange receipts, and retail shop receipts. I would buy her things while I was with her, so the retail receipts worked great. These receipts would usually have the name of the store, date and its address.
Pictures were something I took a lot of when we took our trips together. I would take as many as I could of just her and me. The date and time stamp feature on the camera came in handy on my travels. I took a minimum of two pictures of use together on every trip. When I did submit my application, these pictures went right along with my K1 Visa Application.