http://mumbai.usconsulate.gov/legal_permanent_residents.html
[
B]I am a legal permanent resident (LPR), but I wish to abandon my LPR status because I am now living abroad. How do I do so?[/B]
If you wish to surrender your green card, please come to our office at 7:30 a.m. with your green card, passport, and a completed form I-407 (Abandonment of Lawful Permanent Resident Status). You may obtain this form here. A consular officer will interview you and accept your application. If you would like to apply for a visitor visa on the day you surrender the green card, you should contact our scheduling service, VFS to make an appointment for a visitor visa interview. If you would like to only surrender the green card and not apply for a visitor visa, you should join the line for pending immigrant visa cases upon arriving at 7:30 a.m. Please note that our office will not provide any acknowledgement receipt if applicants opt to submit the I-407 and green card by mail