We all know that the I-130 form can be used to file for most relative petitions. Sometimes we file this form together with the I-485 when visas are available, and sometimes it is necessary to file this form alone, for example when you file for a sibling, etc. In the past one would file with the Service Center directly. Now we have a new policy.
The U.S. Citizenship and Immigration Services (USCIS) has revised its procedures for filing certain I-130 relative petitions. Effective December 3, 2007, the USCIS is encouraging I-130 petitioners to file their petitions with the Chicago Lockbox. This change applies to stand-alone I-130s only. A stand-alone I-130 is one that is filed WITHOUT an I-485, Application for Adjustment of Status. After filing, the petition will be forwarded from the Chicago Lockbox to the appropriate USCIS service center for adjudication.