No one will look at it though and the questions will all still be the same

The ONLY way that could remotely make sense is if you're leaving by land, because you cannot change passports by land border. But if you're leaving by air there's literally no reason to do what you are talking about and it could only create problems for you.

Stamp into Thailand on your US passport. Stamp out of Thailand on your US passport. Stamp into the next country on your Russian passport.

@Rich ***

it was designed to allow one extension per entry. But that was created by the MFA and immigration doesn't like it. So just leave and return bypasses that and gets you a fresh 180 days.

1) You can use an overseas account to apply at an embassy, but you can only use a Thai account to apply for anything (visa or extension) in Thailand.

2) If you enter Thailand without a long-term visa, you will not be able to open the bank account required to apply for the visa in Thailand.

Put the hotel. It's the first place you are going after arrival, and it will be easier to put that address than a village address.

Extensions in Thailand are handled by your local immigration office. Nothing to do with e-visa which is handled by embassies.

@Pertti ************

depends on the dlt office. Some no longer accept yellow books in place of residence certificate

@Bernie ************

each immigration office will have different requirements. Generally your passport, TM30, passport photo and application form. Some offices charge and some don't.

Visa type makes no difference. You need a residence certificate from immigration.

They want a TM30 as proof of where you are staying. Your AirBNB receipt is useless.