The i-129f petition should look like a thick packet when you are ready to submit it. The i129f consists of things such as: proof of meeting, birth certificate photocopies, visa photos and more. You also need to submit the payment of $340.00 check. Once your application is sent, United States Citizenship and Immigration Services (USCIS) will send a notification letter (a receipt) confirming that they have received your application and your payment. This letter is called NOA1 also called as Notice of Action I797C. The NOA1 is the very first letter that the petitioner will receive from the USCIS. This letter also notifies you that they will start checking the application, the relationship with an inclusion of a background check for the US petitioner.
If the petition is approved, the USCIS will send another letter to the US petitioner within about 30 business days. The letter is an “Approval Notice” notifying the applicant that the I 129f petition application has been approved. The letter also notifies the applicant that the petition will be forwarded to the National Visa Center (NVC) for a case number creation. This letter is also called as NOA2, or Notice of Action I797C. The NOA2 is the second letter that the US petitioner will received from USCIS. Once the letter is received, the petition is forwarded to NVC for case number creation and in less than a week the case will be forwarded to a US Embassy where the Beneficiary’s interview will be held.
For a k1 visa process timeline. Click the link. http://efilipinowomen.com/i-129-petition/
If the i129f is denied, the petitioner will receive a notice of action telling them why they were denied and what is needed for approval (if they are eligible). If the USCIS requests more information they will send what is called a “request for evidence” explaining what documents are needed in the Notice of Action I797C.