Can I transfer my wife's visa to her new passport for her while she is sick?

@Matt *******

is she also on an extension of stay? If so she should transfer. If she's on a visa issued inside Thailand she should transfer.

I would bet

@Matt *******

that she does NOT have any Non-O visa, 🙁

I think if you read her stamps it will say the same thing yours says "EXTENSION OF STAY PERMITTED UNTIL" and have the same expiration date you have. AND if that's the case you can't just 'carry two passports' you go move the stamps

@Matt *******

, there's no need to RACE to the immigration office, I mean she can get well and go as long as you move the stamps before she has another 90 day report due.

Otherwise you'd need a signed "power of attorney form" w/the two 5 baht tax stamps on it and even with that they might NOT let you do it for her.

I'd say GO to your immigration office OR have your employer contact them (your spouse has an extension based on you working here) and see what they say

@Matt *******

Did your wife get an accompanying letter from her country’s passport office to take to Thai immigration?

As has been described, take both the old and new passports to your local Thai immigration office and ask if they can be transferred.