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What is defined as a 'competent official' for signing the Form STM 10 affidavit for a marriage-based visa extension in Thailand?

Marriage Visa Extension Form STM 10 Competent Official Thai Immigration Notary Local Officials Village Elder Document Requirements

Nov 15, 2025

3 days ago

ORIGINAL POSTER

Hi am doing my application for first extension based on marriage.  There is an affidavit to be signed by my Thai wife Form STM 10.  It has a section to be signed by a "competent official" .  What is defined as a competent official who can sign the form?  Thanks.

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TLDR : Answer Summary

When applying for a marriage-based visa extension in Thailand, the Form STM 10 affidavit requires a signature from a 'competent official.' This can typically be an immigration officer at the local immigration office handling your application. Other acceptable officials might include a notary, lawyer, local police officer, or even a village elder, depending on local regulations. Community feedback emphasizes the importance of ensuring that this signing step is completed correctly to facilitate a smooth extension process.

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Tony *******

ORIGINAL POSTER

Hi everyone, thanks for your helpful comments. Went to Immigration today to submit all my documents. The affidavit was signed by the IO as suggested by some members. The submission went smoothly as I had all the required docos and the staff at the office were quite helpful. They added 30 days more to my Non O to allow more time for the final approval to come back (approx. 60 days left now on Non O). All good, thanks for the advice.

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Dave ***********

I can sign that for you Tony. 😁

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Tony *******

ORIGINAL POSTER

@Dave **********

not sure I could afford your hourly rate...

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Dave ***********

come on. It’s only a few beers. 🤣

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Dave ***********

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Tony *******

ORIGINAL POSTER

Thanks for the feedback everyone, this is a really responsive group and appreciate you all taking the time to provide advice. Second question is how long after you submitted all the docos did your extension get approved. Thanks.

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Pete *******

I got a 30 day under consideration stamp, returned after 30 days and got the extension.

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Patrick *******************

same... I did mine 3 weeks early this go, with the bank issue I had, glad I did. I wound up with 7 weeks to sort everything.

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Tony *******

ORIGINAL POSTER

thanks

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Tony *******

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Lawrence *******

Hi, could I please ask what size and format for the house photos? Thanks

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Anthony ******************

Notary, Lawyer, Doctor Police. Local official. .

Your location?

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Tony *******

ORIGINAL POSTER

@Anthony *****************

Ubon Ratchathani

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Anthony ******************

yrs the local office will assist.

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Anthony ******************

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Olav *********

We needed a village elder/worker to sign this is where l live.

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Scott *********

I just did mine and the witness only had to sign and give me a copy of the ID signed too.

They didn’t need to attend.

I did mine in Korat immigration

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Peter *******

@Scott ********

I did mine in Udon Thani and the witness had to come to immigration with us and I had a visit from immigration police about 2 days later and then again 30 days after when I went to get my stamp

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Scott *********

wow. Big difference between different immigrations.

14 years. Never had a visit and never mentioned bring the witness with me.

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Peter *******

@Scott ********

I had a marriage visa in Thailand 14 years ago also and it was so much easier then, my wife and I left Thailand in 2012 and we returned back to Thailand this year in june, the visa rules really did change.

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Scott *********

yes. Every year they add to them.

The officers complain that it’s alot of work for them but it is them that keep adding to the list of things needed.

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Scott *********

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Patrick *******************

@Scott ********

Ubon (University location) same.

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Tony *******

ORIGINAL POSTER

@Patrick ******************

thanks same Immigration office as I am using. How long did you have to wait for the extension to be finalised after submitting all the docos?

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Patrick *******************

my entire visa was upside down this go. Had nothing to do with the friend verifying. They didn't need to be there. My issue was with the new method Bangkok Bank is sending retirement money, using International Prompt Pay. Took me a bit of time to get that sorted. That being said, I recommend that a person always go in 1 month before expiration date to begin the extension. Do that and if issues arise you have time to deal. I'm set up now with "Advise Consent" and it comes every month via email, same day retirement money arrives in my Direct Deposit account.

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Patrick *******************

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Peter *******

Hope this helps you

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Tony *******

ORIGINAL POSTER

thank you

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Tony *******

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Dca *****

the Thai Immigration Officer at the local Thai Immigration Office where you are submitting an Application for your Extension at

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Tony *******

ORIGINAL POSTER

thanks thats easy then, thanks for the quick response

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Tony *******

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Pete *******

It’s the immigration officer processing your extension.

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Tony *******

ORIGINAL POSTER

does the document witness need to come with you to Immigration or just provide a copy of their housebook and Thai ID card?

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Ron ******

If immigration gave you the form to get a witness to sign it would normally mean the witness isn't required to attend. They would normally tell you or your wife. It may have changed but when we did our extension in August that form wasn't available for download. We just had our witness sign and provide a copy of their ID and house book.

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Pete *******

my witness had to physically come to the immigration office, they are asked some questions by the IO. How long they know you etc.

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Tony *******

ORIGINAL POSTER

thanks for clarifying, appreciate it.

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Tony *******

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Tony *******

ORIGINAL POSTER

thats great, going on Monday, thanks for quick response

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Tony *******

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