Confused about messages again

[YNY]

Hi folks,
I am really confused , I recieved the following message first on June Then on July for my I485:
Type: I485 , APPLICATION TO REGISTER PERMANENT RESIDENCE OR
TO ADJUST STATUS

Current Status: Document mailed to applicant.
On July 14, 2007 we mailed the document to the address we have on file.
You should receive the new document within 30 days. If you do not, or
if you move before you get it, call customer service.
Then I got this message on August 2nd
I485 , APPLICATION TO REGISTER PERMANENT RESIDENCE OR
TO ADJUST STATUS

Current Status: Notice returned as undeliverable.

On August 2, 2007, the post office returned our last written notice on
this case as undeliverable. This can have serious effects on the
processing of this case. Please call 1-800-375-5283 to update the mailing
address so this notice can be re-sent.

I did not change my address I just did my BIometric again on June 28th, what is going on with this folks, I JUST CAN;T GET IT.
I did call the customer service and gave them my address again to contact the immigration officer.
Any Clues please Help.
ND FOR I-485 IS sept05

Thanks,
yny

 

[themen]

Call customer service and update your address. Delivery error happens.
Good Luck

 

[NYcancerian]

This is the case with my GC.i've been waiting for my card since my approval on Jul 6,and after several calls and inquiries i was told that my card came back as "undeliverable" eventhough i haven't change my mailing address in 4 years .the IO verified my address and ordered redelivery on my card.i'm still waiting though .

 

[Pinkie]

what happened to this response? I got the exact email after i received 2 welcome notices and my greencard almost 2months later. What document can they be sending to me? I have not made any requests and got my Green card about 7 weeks back...