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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 Thailand Immigration NON-O Visa

Немања **********

Немања **********

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asked Nov 7, 2025

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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.

Answer summary

The validity of the bank letter for a one-year extension based on marriage to a Thai citizen is typically 7 days. This information was confirmed by a community member, indicating that you can obtain the letter today and apply within that time frame.

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Bob **********

Bob **********

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

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Немања **********

Немања **********

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I already got an answer from Tod - 7 days.

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

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