So it reads now like you need ALL of the following (not or):
A contract OR employment certification - both certified by the embassy?
A copy of the business registration - also certified by the embassy?
A portfolio
My contracts would be from US companies, and I don't think I can get anything certified at a US embassy as a non-US citizen easily or quickly. I've emailed them back for clarification, but this might mean KL is off the list of places I can apply from.
That's one of my specific questions they didn't directly answer, but it seemed affirmative, I stated that I was not Malaysian and would only be visiting KL with the purpose of applying for the DTV. I probably won't be able to get there until September, so likewise, keep us posted!
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They responded to me here within 24 hours. These are the questions that were answered, in case that helps anyone:
5. Proof of prolonged residence in Thailand:
If you were sponsored an accommodation by Thai citizens, please attach the invitation letter along with a copy of the person's Thai ID card and house registration.
6. A copy of a recent savings or checking bank statement with an ending balance of no less than:
A foreign bank account is acceptable as long as the ending balance is at least 500,000 THB.
7. An employment contract or employment certificate in Malaysia or a professional portfolio showcasing digital nomad, remote worker, foreign talent or freelancer status:
You can provide the contract for remote working to apply for a DTV visa. Please attach it along with the monthly income for the last 6 months.
you can initiate the transaction from wise and it kinda looks like one transaction. You tell wise 'I want to send x currency from a to y currency in b'. Then when you follow the instructions to make your deposit from bank a, they automatically convert and forward it on per your instructions.
I had plans to be travelling to Chon Buri on the date I needed to return for my stamp after 2 weeks. I was only gone for 4 days, so I explained my travel plans to them and asked for a couple days grace. They didn't change my consideration stamp, but said ok fine but don't be any later than the day you say. It was maybe 2 days after the stamp I was returning.
I walked to immigration from the airport on my way back to Chiang Mai, and got my extension stamp no questions asked.
Obviously YMMV, but thats my experience. You can plead your case, at least with me they were amiable, but I can imagine it could have easily gone any other way.