In USCIS case status, its saying Card Was Determined As Undeliverable By The Post Office. On May 2, 2018, the Post Office determined your card for Receipt Number SRCXXXXX, is undeliverable. We mailed your card to the address you gave us, but the Post Office could not deliver it. The tracking number assigned is 920559XXXXXX. You can use your tracking number at www.USPS.com in the Quick Tools Tracking section. Please go to www.uscis.gov/e-request to request that we resend the card to you. If you move, go to www.uscis.gov/addresschange to give us your new mailing address. How long it would take to get the card again? Thanks