I got a notice today from INS. I think it should be the welcome notice. When I spoke to my attorney, they told me that they will receive the approval notice. Below are my details.
05/08 - Notice mailed welcoming the new permanent resident for myself email.
05/08 - Card production ordered for myself, wife and kid email
05/09 - Notice mailed welcoming the new permanent resident for wife and kid email
05/13 - Approval notice sent for myself, wife and kid email
05/15 - Welcome notice received
Still waiting for the actual cards