My parents received Green Card couple of years back ( in Jan 2010). After getting the green card approved, they came to US, received the official plastic card, applied SSN, .
They stayed with me in US for more than an year. They left to India in Jan 2011. I have filed taxes for 2010 claiming them as my dependents .
They came back to US on December 2011. During the entry at port of entry, the immigration officer asked some questions and stamped "407 advised" on their passport.
1. What does "407 Advised" mean ?
2. They are planning to go back in May (which makes their stay period for 5 months and 20 days). They are planning to come back in October (less than 6 months). Will it be a problem ?
3. Can applying for I-131 (re-entry permit) be of any help ?
Any help is really appreciated.