I wasn't sure what the consent form was about, I was just reading around and many sites mention a form e.g. "Spouse Consent Form (If married)" at https://freshbangkok.com/guide-buying-investing-bangkok-condos-foreigners.
So is there only this one form that she'd sign, and is it about agreeing that the property will be the foreign husband's personal (not marital) property? If so, then even if wife's consent isn't required, it would be better to get it (if possible), right?
Also, how about when it comes time to sell the property... on that web site under the heading "Seller Document Preparation" it also lists "Spouse Consent Form (If married)". What is that about? Foreign husbands need the wife's agreement to sell the property? What if he didn't get the wife's consent when he bought it?