My EAD got approved on July 9, 2007. Case status changed twice: from Card Ordered to Approval sent. At the end of July status changed once more saying Card returned as undeliverable by the mail service. I never changed my address and my wife got her EAD no problem. I called them once and lady asked me to provide my new address which is essentially same as before. She told me that she will send a Service Request and advised to call back in 30 days. Two weeks passed and status of my EAD stays the same: Undeliverable. Should I worry or this is a common practice to be bounced for a few months? Thank you