I applied for i751 to remove to condition on my green card on april 2019 then the uscis sent me extension letter with 18 months then they sent my biometrics appointment and I did it . Now my case status changed to ( Document Was Mailed To Me
On July 10, 2019, we mailed your document for Receipt Number MSC 000000000000 directly to the address you gave us. If you do not receive your document by August 9, 2019. I applied i751 with annulment waiver . Do y'all have any idea about what type of document they sent me ?