When a Thai woman gets divorced she must wait 310 days to remarry in Thai law . Does that mean you can not start a K1 visa for her to USA until the 310 days are up ? Or those the USA not care about the Thai waiting period ?

The list of documents required at Chiang Mai for a 1-year extension of stay base on Thai wife/children says, "In case of divorce must bring Divorce Certificate to show"

* Does that mean the legal proof of divorce previous to your current marriage? I mean, that's necessary in order to get a Thai marriage registration & certificate, which you need to include with the application anyway.

* Or is it for the case when you have divorced the mother of your half-Thai children?