Once USCIS receives your visa petition, I-130, Petition for Alien Relative, it will be approved or denied. USCIS will notify the person who filed the visa petition if the visa petition is approved. USCIS will then send the approved visa petition to the Department of State’s National Visa Center, where it will remain until an immigrant visa number is available.
Because the number of immigrant visa numbers that are available each year is limited, you may not get an immigrant visa number immediately after your immigrant visa petition is approved.
The National Visa Center will notify you, the foreign national, when the visa petition is received and again when an immigrant visa number is available. You do not need to contact the National Visa Center, unless you change your address or there is a change in your personal situation, or that of your relative, that may affect eligibility for an immigrant visa, such as reaching age 21, marriage, divorce, or death of a spouse.