DrJack54

Yes have read about KK 500b. At least you get it on the spot. In my thinking it's just the typical Thai nonsense. 90 day report receipt should be sufficient

No problem.

Just one person's opinion.... 1. Book your flight into Thailand. 2. Book a return flight Bangkok to Siem Reap obviously staying less than 45 days in Thailand before flight to SR. The flight to SR covers your onward flight (possible) requirement from Airline when exit USA. Your second visa exempt entry to Thailand from SR ...onward flight is covered by your return flight to USA. Don't muck around with land travel and borders.

You will need to show 800k in your Thai bank account for the non O and if you cannot show 12 months of previous 65k transfers you will need to use money in bank method for extension.

Yes. CW for residence certificate. Cost 200 baht and posted out within 2 weeks, however one week more likely. For CW the main thing they require is your 90 day report. If you are not doing 90 reports a residence certificate will not be possible. Regarding appointment. All business from extensions etc you can do walk in.

Good. Any questions at all given extensive history.

No tax either way

Does not have to be direct transfer of pension. Just needs to be 65k+ every month transfered from overseas into your Thai bank account.

The airline may ask to see an onward flight. Hopefully by explaining that you intend to obtain an extension. If not allowed you could buy a throw away cheapest ticket on the spot. The airline might not even request to see onward flight. Assume that your return ticket to USA is flying out of Bangkok. If so how do you intend to reenter Thailand from Cambodia. Edit: just realized that to return to thailand via air you will have your ticket back to USA to show for your onward flight requirement.

Correct

No. Especially in recent years. Banks in Bangkok in particular are requesting residence certificate and in Bangkok that requires you to be doing 90 day reports. Obviously not possible on visa exempt entry. Banks will also accept letter from your embassy. Bottom line is that it is not straightforward. One option is to use an agent.

Assume you mean arrive visa exempt. Yes not easy to open a bank account. Even more so in Bangkok. An agent for the bank account is good idea as it can be done quickly

Don't worry about it. The TM6 is a nonsensical form that has been temporarily suspended (at airports) and some think will be not reappear on the landscape..

Do not think that's an issue. From the OP...... "......do you haveThai friends here, and she wanted the phone number of one Thai friend,....". That's not normal. And again the other questions are what is on the TM6 form which strangely has been suspended to "speed up the process".

Would need to check with immigration office. Should be possible but some offices don't allow combination method.. Most do allow.

Here are requirements I pinched from ubonjoe post on this topic in another thread. And no your wife does not need go with you. https://savannakhet.thaiembassy.org/th/publicservice/non-immigrant-visa-o-visiting-family-member-of-a-thai-nationality-a-sp?page=5d84a44c15e39c26b400453e&menu=5d84a44c15e39c26b400453f

Yes as OP has just advised...UK pp. So no income letter from embassy. The immigration office (most) will want to see 12 months of transfers. Harsh...I agree. He will need to use "money in bank" method for first extension.

In that case you will not be able to use income method for your first extension. However you can change to income method in the future.

Not sure what you mean. For income method without income letter from embassy he would need to show 12 months of transfers (at most immigration offices) for extension.

Does your embassy provide income letter. Eg not UK, USA or AU.

That's not history.......that's ancient history.

Don't waste your time. What they mean is that they obtain an extension each year. It's not a non O-A or a non O . They are visas. They are obtaining 12 month extensions. A non O-A can only be obtained in your own country or country where you are permanent resident. A non O can be obtained in own country and also some countries Thai consulates and embassies. Eg Savannakhet etc. A non O can also be obtained inside Thailand from entry via tourist visa and visa exempt.

Unless she has spent recent extended periods in Thailand she will not be asked to show money. Aside: pretty sure it was changed to 10k for individual and 20k for family.

Yes. As you pointed out the application can be made up to 30/45 days prior to expiry of current permission of stay. In having the bank account back up to 800k that must be done at least 2 months prior to day of application. Lot of folk using this method (including myself) prefer to just leave the 800k+ in the account all year round. Avoids any slip ups

A non O-A is a visa valid for one year. When someone obtains extensions of permission of stay from that visa it is simply an extension of stay. A non O-A cannot be obtained in Thailand. BTW there is no such thing as a "retirement visa"