I arrive in BKK next week on a single entry O spouse visa from the UK. I will stay 2 nights in BKK before travelling to my wifes house in Chiang Mai normally I go direct but she will be busy working.
On the Plane arrival card do I put the hotel details of where I will be staying or my normal home address in Chiang Mai, normally the first day or the next day on arrival I visit Chiang Mai immigration and report with TM30, but if I do this they may think I have wasted 2 days before reporting when its meant to be done within 24hours or maybe I should show sales invoice from hotel? - thanks in advance/
TLDR : Answer Summary
When arriving in Bangkok on a single entry O spouse visa, you should provide the address of the hotel where you will be staying on the arrival card. The immigration authorities in Chiang Mai should not question the two-day gap in your travel as long as you follow the TM30 reporting requirements within the specified timeframe.