They will want both your entry stamp and your TM30 as part of the application to get a CoR, and they'll likely notice your TM30 is from before you entered Thailand and it will not be valid.

Long-term visa or extension. Like marriage to Thai, retirement, volunteer, etc.

You're just going to get them to look at your harder if you try this. They are going to ask you why you are changing passports and what you're trying to hide.

@Rogerio *****

What injustice? You were granted a visa on the basis of doing an activity. If you are not doing that activity, they are free to both deny entry and/or revoke your visa.

@Frank ********

You must be within the jurisdiction of the embassy to apply there. That means you must PHYSICALLY be there. It specifically asks you what is your physical location, and has a question in the application for proof of your current location. Embassies are also known to randomly summon people for interviews to ensure they are actually there, and do other things.

@Martin *******

probably

Normally an immigration office will only deal with people from that province.

@David *******

That's your problem. A non-OA visa is ONLY available from your passport country or a country you are a resident of. You are not a resident of Laos, and therefore your application is rejected. You can get a 90 day non-O visa in Laos, but you cannot get a 1 year non-OA visa. Sounds like you might have selected the wrong options in the visa application.

@Michael *******

What about it? It was created by an AGENT and specifically mentions only a single immigration office.

@Alan ****

the embassy website will have a list of approved Thai insurance companies