8 hours ago, mosan said:

The letter they are talking about is for the personnel at the Thai Embassy/Consulate in Vietnam requesting the Non O visa for her spouse for entry into Thailand...

  Read that post again.  He said a letter is needed "to enter Vietnam".  False.

17 minutes ago, TheAppletons said:

  Read that post again.  He said a letter is needed "to enter Vietnam".  False.

Never rely on what posters put on ThaiVISA. You should go to the embassy websites to get your information...

 

Also:

Sample of wife's letter requesting visa for Thailand Consulates/Embassies:

 

"Hello,

 

My name is [wife's name here] and I am asking for the consulate to please grant a visa for my husband [husband name here] with passport number [passport number here] from [home country here] so that he can come stay with me in [city/province you live in here] thank you.

 

[wife signature]" *written in Thai 

 

From <https://forum.thaivisa.com/topic/1118780-non-immigrant-o-at-ho-chi-minh-city-report/>

13 hours ago, mosan said:

Never rely on what posters put on ThaiVISA. You should go to the embassy websites to get your information...

Better still, you could do both.  Although the embassy websites are most of the time pretty complete and accurate, they are often notoriously late with updating the site when changes are introduced.

So a simple post on TVF could be quite helfpful > Checked the xxx embassy website for yyy and it states zzz.  Is this still correct, or any other tips/caveats of relevance? 

2 minutes ago, Peter Denis said:

Better still, you could do both.  Although the embassy websites are most of the time pretty complete and accurate, they are often notoriously late with updating the site when changes are introduced.

So a simple post on TVF could be quite helfpful > Checked the xxx embassy website for yyy and it states zzz.  Is this still correct, or any other tips/caveats of relevance? 

Will have the wife call the Thai embassy in HCMC to verify.