@Paul ******

just for reference my 2 appointments were spaced over 2 weeks. I wrote a cover letter explaining that I wanted to get extensive work done over the space of a year.

@Andrew *****

Mine were within 3 weeks of each other, AFAIK there's nothing official that says otherwise

@Mark ***

You have nothing to lose by asking the dentist to produce another letter including dates. Here's the thing as I've mentioned, if you have a letter with at least 2 appointments then you'll have the visa. You can easily attempt to get this before submitting the application therefore you have nothing to lose by only submitting the application once you have a signed letter confirming 2 appointments

@Tommy *********

My dentist only provided an appointment slip which is not what the embassy requires and the likelihood of rejection is high. The London embassy at least require a signed letter confirming an appointment and description of treatment. I know for a fact certain dentist's (not mine) will provide this via email. You'll have to do some digging .

@Gary ******

I wasn't going to class just for the ED visa, I genuinely want to learn and have been for s number of years. Honestly I don't believe in methods or magic systems. You just need a decent teacher and to surround yourself with Thai people and Thai situations. There's no shortcuts. Thanks for the link anyway.