A green card holder may abandon permanent residence by filing form I-407, with the green card, at a US Embassy.
Under certain conditions, permanent residence status can be lost involuntarily. This includes committing a criminal act that makes a person removable from the United States. A person might also be found to have abandoned their status if he or she moves to another country to live there permanently, stays outside the USA for more than 365 days (without getting a re-entry permit before leaving), or does not file anincome tax return. Permanent resident status can also be lost if it is found that the application or grounds for obtaining permanent residence was fraudulent. The failure to renew the permanent resident card does not result in the loss of status, except in the case of conditional permanent residents as noted above. Nevertheless, it is still a good idea to renew the green card on time because it also acts as a work permit and travel permit (advance parole), but if you do renew your green card late, there is no penalty or extra fee to pay
A person who loses permanent residence status is immediately removable from the United States and must leave the country as soon as possible or face deportation and removal. In some cases the person may be banned from entering the country for three or seven years, or even permanently.