Following is my conversation with IIO
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Girish: My name is xxxx and I would like to find out the status of my I485 application, and I will appreciate any help in this.
IIO: What is your LIN Number
Girish: LIN-01267-5xxxx
IIO: Your case is pending
Girish: Can you tell me that is it assigned to a officer?
IIO: Yes, It was reassigned to the office on Dec 27th
Girish: When I checked my status on the web site it said this case may take 450-480 days, but it's more than 580 days now. Is there any way that you can send a message to the adjusting officer and request the status?
IIO: I will send a 'CC Note' to the officer to find out some more details.
Girish: Thank you very much
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So, my feeling is 'CC Note' may be a part of their Customer Management software, and most of the IIOs use it frequently.
Again, my personal experiance is the IIOs may forget about your cases, and you have to send them some reminder which will help your case. And the only way to send a quich reminder is the 'CC Note' (as described by the IIOs in the above conversation).
Good Luck!!!