For VSC
My 485 was approved from VSC. I went for stamping at SF, since
I live in bay area. The approval notice of my kids say that cards will be mailed in three weeks. Inspite of that I took my kids for stamping. When I checked the AVM on the same day, the message for
the kids said that cards were ordered and I received the cards withing
five days. The approval date was 3/29 and cards received by me
on 4/12.
You need stamping, if are required to travel.
However, the approval notices from CSC looks different.