kiwiaussie

24 years and the OP could have been either a PR or a citizen by now, and this wouldn't have been an issue. Sounds like he was totally eligible the entire time. Whatever the case, as others said, get your social security health insurance locked in. You only have 6 months post finishing work to sign up for it (a one off thing too), but at 432 baht per month for near universal coverage, it is remarkably good value. https://www.thaicitizenship.com/thai-social-security/

Here's a good article https://www.thaicitizenship.com/thai-social-security/

nope. Thailand want to see the entry and exit stamp in the same passport. He won't be able to leave. Catches out many UK and US folk given they don't have a formal exit imigration. Thailand does.

If he enters on the Thai passport, he'll have to leave on a new valid one. Make sure you'll be able to renew his PP in Thailand and have all the documents with you to do so. Otherwise he'll be stuck here. That will mean being registered on the Tabien Baan, and ideally, having an ID card if aged over 7.

driving to East Berlin would have been super interesting!

yes it appears so!

Honestly, if you are starting from zero now preparation now, I wouldn't bother. You are going to need notarisation and police records from your home country, documents and tax returns from your HR, plus time to have the PR desk check them all, vet them. You normally have to get the ball rolling well before the offical announcement. Given you are married to a Thai citizen you can skip PR anyway for roughly the same qualifications. Paperwork is much easier and it only costs 5,000 baht (vs 98,000 for PR). You can apply all year around too. No need to choose nationalities and the Thai language test is waived for married applicants. https://www.thaicitizenship.com/thai-citizenship-application-process/

Just saw this online: https://www.thaicitizenship.com/thai-permanent-residency-for-2023-applications-now-open/ Digging in, looks legit. The PR page of the immigration website is here: https://www.immigration.go.th/en/?page_id=1744

Would it be an issue in life? Mostly no, except at perhaps the worse possible time, as Heng, suggests. Is it hard to change? No. A quick trip to the district office to get a new ID card issued, and then the next passport the name will be updated.

She entered on her foreign passport, she should exit on it. If she's under 15, no stress, as their is no fine. You should always enter and exit thailand on the same passport. https://www.thaicitizenship.com/traveling-as-a-dual-citizen/

The best site for this is www.thaicitizenship.com - lots of free guidance there. Also a long running thread here (300+ pages).

Why on earth are you going for residency? If you are married to a Thai citizen then you can skip PR and get citizenship with roughly the same qualifications. Substantially cheaper (5000 baht vs 98,000 baht) and comes with a heck of a lot more rights.

You are misreading the law. This article explains how you are misreading those particular clauses in the nationality act https://www.thaicitizenship.com/thai-dual-citizenship/

Correct - that's the one. They should update their Thai ID when they arrive, and with that, head down to immigration and get an annual extension based on that. This article explains it all a little more: https://www.thaicitizenship.com/thai-ancestry-visas/

A child being born in Australia to two non-resident Thai parents wouldn't be eligible for citizenship there either. What's your point?

You didn't read far enough. There is a Q&A section down the bottom under the article and 'passport swaps' are addressed there.

As others as said, he won't be allowed to swap passports at land borders. https://www.thaicitizenship.com/traveling-as-a-dual-citizen/

Swapping passports at borders does not work. Repeat, does not work. Border guards on both sides look for stamp trails and don't like it if they are in separate passports. It only works in the air, so she'll need to fly down to KL, Singapore or Phnom Penh and fly back into Thailand on her Thai passport. As said, save yourself the heartburn and just front up the 1900 and get this visa. She just shows her ID card and she'll get this visa no worries. Next time she flies out she can do the passport swap. About the Thai ancestry visa: https://www.thaicitizenship.com/thai-ancestry-visas/ About how dual citizens can travel: https://www.thaicitizenship.com/traveling-as-a-dual-citizen/

If the mum and the child both entered on foreign passports they are both subject to Thai immigration rules. The mum will be fined for overstay despite the fact she is also a Thai citizen. Strange but true. The child also should get a visa, but will not be fined for overstay until the age of 15. Both of them can easily get this yearly extension of stay stamp in their swedish passport simply by showing proof of Thai citizenship. Next time, they should just enter on their Thai passport to save any fuss. https://www.thaicitizenship.com/thai-ancestry-visas/

Thai's born overseas go through life with two birth certificates. Their foreign one, and a Thai one issued by the Thai embassy in the country of their birth. It literally is a birth certificate (as opposed to what others have said here). It is just slightly different format to the ones issued in Thailand. You can read about it here. https://www.thaicitizenship.com/thai-citizenship-when-born-overseas/

If you can’t find your ID number for the district office to cross reference (it should be at the top of your Thai birth certificate), then you now have the option of a DNA test with close relatives to get citizenship https://www.thaicitizenship.com/thai-citizenship-using-dna-testing

This is Thailand's position on dual nationality. In essence, for those born dual citizens, Thailand doesn't care. https://www.thaicitizenship.com/thai-dual-citizenship/

If she's got an ID card etc, then no one will question her. An ID card is all that is needed to get her a bank account, social security etc and be paid just like any other Thai. Work permit and visas are separate departments. So for all intents and purposes she'll be treated as a Thai for everything except visa issues, so she'll be on the visa treadmill until she returns on a Thai passport and closes that loop. Strange but true.

she wont be able to 'close out' her visa as the previous poster suggested though it would be good if she could. If the enters Thailand on a foreign passport she'll be subject to the rules as they apply to that nationality. She'll have to leave and re-enter Thailand on her Thai passport. Fortunately, if she isn't planning on doing any imediate travel, she can get an extended one-year visa based off showing her Thai ID or showing she is the child of a Thai citizen https://www.thaicitizenship.com/thai-ancestry-visas/