Just write your own letter using your company's letterhead.

Your visa states "employment prohibited". The Thai authorities permit online work, but I wouldn't go around advertising you're working in Thailand as that can lead to misunderstandings and problems.

You'll only need to prove what you're doing if you go in for an extension, but you can always use an alternative such as a soft power activity if you're no longer employed.

I'd imagine a work contract you update and having the 500K in your account for at least 1 month would suffice though; you can easily update a work contract yourself even for a company you no longer work for.

Since we're talking work based abroad, Thai authorities really have no way of verifying anything.

@Felipe ********

Tax returns asked for at consulates. Can't see it being asked for at immigration in Thailand when entering the country. No way for immigration to verify its authenticity or to deal with lots of different languages.

@Felipe ********

An IO can't verify overseas employment. Not their jurisdiction

@Paul *******

That's good advice but not practical for most. You only need 500K to apply for the visa and to receive an extension not as an ongoing thing or for entry or re-entry. The documents needed to apply are also generally not needed; verbal confirmation of what you do should normally suffice (it has for me).

@Asso *****

Exactly and you could always explain that you have access to money or other bank accounts so there's nothing to worry about.

@Damien **********

You're talking nonsense. The AIRLINE checks your ticket. Period.

@Damien **********

Yes you do and its a requirement to enter Thailand on visa exempt.

@Andrew *******

It does, most of the time. Immigration usually doesn't ask, the airlines do. It's their job.

@Damien **********

No. On a visa exemption you have to show proof of outbound travel to the airline. They can usually see it already if you've booked an onward or round-trip ticket with their airline.