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How long is a bank letter valid for when applying for a marriage-based visa extension in Thailand?

Visa Extension Marriage Visa Bank Letter Validity NON-O Visa Chaeng Wattana Office Expats in Thailand

Nov 7, 2025

3 days ago

Немања **********

ORIGINAL POSTER

Hi. 

Regarding the letter from the bank for the one-year extension based on marriage to a Thai woman, how long is the letter valid for?  

Can I get it, say, today and apply in 7 days with it?  

For Chaeng Wattana office in Bangkok.

Thanks.

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TLDR : Answer Summary

The validity period for a bank letter required for a one-year extension based on marriage to a Thai woman is 7 days. This was confirmed by a user in the comments.

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Bob **********

For a non-o extension based on being over 50 usually the day off

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Немања **********

ORIGINAL POSTER

I already got an answer from Tod - 7 days.

If anyone else needs this information, it's here.

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Немања **********

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