I just submitted the K-1 I-129F package with evidence of having met within the last 2 years, photos, flight itineraries, and hotel bookings. We did not have an engagement party so we have no pictures and we weren't planning on it. I understand that it is not required for the I-129F submission but will it be required down the line during the interview in HCMC? I will be visiting her later this year and maybe it will be a good idea to have an engagement party so we can have pictures.