印象中，现在绿卡申请的邮寄改了。还是分区域寄往不同的中心吗？还是大家都寄往一
个地方？具体是哪里呢？多谢

1) Form I-140 petition - Immigrant Petition for Alien Worker, if the the place of your permanent employment is in: Alaska, Arizona, California, Colorado, Guam, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin, or Wyoming:

2) If the the place of your permanent employment is in: Alabama, Arkansas, Connecticut, Delaware, the District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New Hampshire, New Jersey, New Mexico, New York, North Carolina, South Carolina, Oklahoma, Pennsylvania, Puerto Rico, Rhode Island, Tennessee, Texas, Vermont, Virginia, U.S. Virgin Islands, or West Virginia.

also see http://www.greencardapply.com/question/question.htm