If you have any criminal violations since you were approved for your Green Card, you should first consult with an immigration lawyer before you fill out any documents with USCIS or do any international traveling. As part of USCIS processes, thorough background checks are performed on all applicants wishing to renew their green cards. If the background check reveals that you have a criminal history that would make you deportable under the certain rules, USCIS may choose to place you in removal proceedings.
Current fee is around $450 every ten years. This cost adds up fast once you include the filling fees that have increased over the years.
During the time that it takes to process your renewal application, it is not advised to travel outside the U.S as you significantly risk your chance to re-enter.
There is a very good chance that your green card will be denied when it comes up for renewal if you are openly sympathetic towards terrorist groups.
LIVING SOMEWHERE ELSE
If you do not reside in the U.S for at least 6 months of the year then immigration officials often deny your request to renew your green card.
Failure to pay state of federal income tax is also ground for the federal government to deny your request.
If during the renewal process immigration learns that you have made misleading or fraudulent statements on your green card application, it can revoke your green card or refuse its renewal. Remember, honesty is seriously the best policy.
Though green card renewal is not necessarily something to be worried about, it is important to know some of the pitfalls in the process.