She sent him a scan of the bank loan contract, so I said to blank out the names and give them to me. ????
On the first page at the top of the contract there is only one person listed, his estranged wife.
At the end of the contract she signed first, he signed second, then two banking or loan staff.
So his is the second signature down, with the long Thai language sentence next to it.
Google Translate translates it as simply 'Consenting Spouse'.
He produced nothing but his passport with visa and extension.
So, he simply signed as consenting spouse.