I did in chong mek border on 1st august easy 2000 bht and photo arrival card get visa go in go duty free sit drink coffee 15 minutes. Go back in another 180 days if i will be asked but i havent "well i wanted to buy some stuff from laos duty free thats all
I went for updating facial bio photo they did ask passport but they just looked and copied the front and no other pages updated my photo and got a new book bank