enquiry ?
I mean written enquiry by attorney about the case status. See the following from ins web site
Writing: While calling can be more convenient, you may instead choose to request an update by writing the Service Center. Please note that the Texas Service Center prefers that customers fax their inquiries. Specific information about the centers can be found under INS Field Offices.
If you write, please provide the following in your letter:
Your current name and address, and, if different, your name as it appears on your application;
Any A-number, which is an 8 or 9 digit number following the letter "A", assigned to you or to your application
Your date of birth;
The date and place where your application was filed;
Any receipt number from any receipt notice issued by INS for your application;
A copy of the most recent notice sent to you by INS on your case, if you have received one; and
The date and office where you were fingerprinted and where you were interviewed, if this has been done.
Sign your request, or, if you are preparing the request for the applicant, have him or her sign the request. Please mark your envelope: ATTN: Status Inquiry. With the exception of the Texas Service Center (please see its web site for specific information on faxing your inquiry), please send your inquiry to the address listed in the "About Us" section of the INS Field Office pages.