Hi. I need help. An agent told me they not allow to exit Thailand via border to Laos, Vientiane. The agent told me must to exit only with a flight. However, I have never heard of such restriction before. I have booked a flight to Udon planning to cross there. My biggest worry that they will tell me to return to Bangkok and order a flight to Vientiane. I have heard they don't allow some people in but never heard they deny exit.