The National Visa Center (NVC) processes immigrant visa petitions after the USCIS approves them. When the immigrant visa case is current or about to become current, the NVC will send a bill to the petitioner asking him or her to pay an I-864 processing fee. The NVC will send the bill with an envelope with a bank address and instructions on where and how to pay the bill.
After the bill has been paid, the NVC will send the I-864 Affidavit of Support to the petitioner for completion. The petitioner or sponsor will complete and sign the I-864 before a notary public. After the I-864 is complete, the petitioner should send it to the NVC using the envelope provided.
The NVC will review the I-864 Affidavit of Support for technical completeness and correctness. If the I-864 is not technically correct or complete, the NVC will ask the petitioner or sponsor to correct and complete the I-864 a second time. It will explain what is lacking in the previously submitted I-864.
Note: When a corrected I-864 is returned to the NVC, it will be sent to the embassy or consulate where the applicant will apply for a visa. The NVC will send it with the immigrant visa petition.