They send a email to both the beneficiary and petitioner. We received an approval on 7/7/23, was sent to NVC 7/13/23 and we received our welcome email on 8/7/23, paid the fees 8/7/23 and received an email 8/8/23 to upload documents. I'm not sure if my attorney contacting them a week ago helped speed up the process. Here are some helpful links that may help speed up the process for the welcome letter as well as which date NVC is currently working on. Hope this helps.
https://travel.state.gov/content/travel/en/us-visas/immigrate/nvc-timeframes.html
You'll need to click on NVC Process below to open the visa journey page for helpful tips.
