Non O extension question

[patekatek]

First of all, I did try a search for the information but did not get any results. Perhaps my error.

My married to a Thai visa expires on March 4. When can I appear at Hua Him immigration to apply for an extension? Can I do it the day before it expires, two weeks early, or on Feb. 4?

Thanks!

[ubonjoe]

You can do it up to 30 days early.

[Sceptict11]

Best do approx 28 days before the visa expires.

You will then have time should immigration require additional information/ paperwork.