What documents are needed for applying for a trailing spouse Non-O visa and extension in Thailand?

I was on the piggy back visa with my wife, her company done everything, will your wife’s company not do this for you ??

Unless someone has done exactly what you're doing; an argentinian and canadian couple with the canadian one working legally here trying for a trailing spouse Non-O visa/extension at the Surat Thani Immigration office any feed back you get is gonna be near worthless 🙁

The way you know what's required is for BOTH you and your wife to slog on over to the immigration office (take your marriage certificate, her work permit, both passports). Get the hand out from the Surat Thani Immigration office listing the requirements to get both the initial 90 day Non-O visa and then the matching year extension.

You will also need documentation from her employer stating it's okay for you to be 'piggy backed' on to your wife's Non-B visa/extension, and documentation from them too I believe.

There are over 80 immigration offices in the country and there is no "one size fits all" list of exactly what's needed. It takes going there, talking to them, getting the hand out then jumping thru the hoops required to get those documents so you can go back and apply for the 90 day Non-O visa for 2000baht and then 2 months after you get that visa issued you go back and get the matching extension for 1900baht