Hello I got a cancellation letter for my ED visa this week from my school dated for the 10th this Friday, for when I plan to go to Mae Sai border for the day, my tutor told me it's best to go to immigration in Chiang Mai this week to cancel the visa there ready, but he said it's also possible to bring the letter to Mae Sai immigration and do there when crossing too
I planned to go to immigration in Chiang Mai tomorrow but I realise it is closed because of a royal holiday :/ I am worried now as I leave at 8am on Friday to go to Mae Sai will I have problems that I didn't cancel?