I-129F, Petition for Alien Fiance(e)[USCIS Instructions](also used in K3 apps): This form is used to petition to bring your fiance(e) and that person's children to the United States for marriage to you or to bring your spouse and that person's children (K-3 and K-4 visas, respectively) to the United States to complete processing for permanent resident status (under the LIFE Act and Amendments of 2000); please see section 12 of the Instructions to the form.
I-134, Affidavit of Support: To file a promise with the Bureau to support an alien entering the United States and that the alien will not become a public charge. A separate affidavit must be filed by the sponsor for each person.
G-325A, Biographic Information: To provide biographic information on an alien. You file this form only as instructed on another Immigration application or petition.