Today I received e-mail from USCIS stating --> "Service records indicate that your case was approved and your I-551 card was mailed on May 9, 2011 to the address we had on file at that time. Please check with your local Post Office for undeliverable mail. Your document has not been returned to us. "
Looks like I am greened. But when I check my status on uscis.gov it shows "initial review" same from last 4 years, there is no LUD change also. I didn't receive any welcome e-mail or card production ordered. Is anyone in same scenario? Is this normal process?