arbiter, i have read posts over the internet and i am not 100% sure what the laws are. Even the SSN website it is little confusing. This is for my father. I was wondering if anyone or their parents have been in the similar situation where they are abandoning the green card. The reason is because of the requirement of having to live in US 6+ month in a year. He is already retired and prefers to stay in Nepal.

Anybody have experience on this?