What is the process of CP?
TOP Once the USCIS approves an immigrant petition requesting consular processing, it sends the approved petition to the National Visa Center (NVC). (If the I-140 approval notice indicates the petition file is being held at the USCIS in anticipation of an I-485 application, then see the response to Question 17 about switching from I-485 to CP.) The NVC handles processing of the immigrant visa application in advance of the interview at the U.S. Consulate abroad. The NVC will assign a case number and then send the Immigrant Visa Application Processing Fee Bill to the applicant. (In the case of a family-based petition, the petitioner will also be asked to pay the I-864 Affidavit of Support Fee Bill.) The Fee Bill can be mailed to the NVC or paid online. The next step is to send the DS-230 Immigrant Visa Application Form and items listed on the Document Checklist (e.g. birth certificate, marriage certificate, police certificate) to the NVC. Once the applicant submits all the necessary forms