There is an important change affecting processing of I-130 applications. Effective January 1, 2012, domestic petitioners who are filing standalone I-130s (in other words, not in conjunction with other applications, such as an I-485) must mail their applications to either the Chicago Lockbox or Phoenix Lockbox. The location of the lockbox will depend on where the petitioner resides, and can be found in the revised mailing instructions of the I-130 starting January 1, 2012. For more information, interested parties should of course consult USCIS or visit their website directly. USCIS has indicated that the mailing protocol for I-130s filed in conjunction with I-485 (adjustment of status application) remains the same. Obviously, it is important to ascertain the correct filing location before mailing in an application. In the case of an I-130, which can sometimes take anywhere from months to years to get approved, any delay can affect a case and cause needless anxiety and uncertainty.