How is the I-864 processing fee paid?
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.