Yesterday we went to the Immigration Office to extend my 90 day Non-O Visa based on Marriage. Well as it turns out we have to go back again in about 2 weeks as: we turned up and dealt with a very nice Immigration lady, but: 1) we came too early, must have used at least 45 days on our 90 day Non-O visa, 2) when we come back, need an updated bankbook and letter from the bank, 3) update blue book at Amphoe-a small name change 4) updated marriage certificate from Amphoe showing that we are still married; it will be a stamp on this certificate. All doable. Immigration was very patient and helpful with us.