I need some advice. I was helping my parents with their visa for Thailand and it got rejected for “incorrect travel document.” They are U.S permanent residents (green card holders) and they have a travel document “Reentry Permit” issued from US homeland Security. They were able to obtain a Lao visa but not a Thai visa? I called the Thailand embassy in Washington and they told me that they do not accept reentry permits. So what is the correct document/ travel document I need? Thanks in advance!