Its titled "ADJUSTMENT OF STATUS INQUIRY RESPONSE FORM". It seems to be a standard photocopied form with USCIS stamp on Left & address of LA office on right.
I guess it means FBI + other checks......
There are total 14 Sr #s on the single page. In my case, Sr # 5 & Box # 3 are checked.
Below is the Exact wording as it says on the letter_
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5. (CHECKED) Your Application for adjustment of status is currently pending:
- (NOT CHECKED) receipt of FBI RAP sheet/Updated RAP sheet
- (NOT CHECKED) completion of a new fingerprinting clearance. Your appointment notice is attached.
- (CHECKED) Background Security Check (certain necessary security checks may take more than 90 days to complete. If only this security block is checked off by US CIS, you may inquire about the status of your case after 90 days from this response.)