For years, I have always reported online without problems, until a hotel reported a different address from my home for two nights.
Now I am on the coast of Rayong and The last online report was rejected after several attempts and I had to return to Chiang Mai Immigration to report it in person.. Without problem. I will be on the coast for a couple more months and I guess I will have to return ONLY to report 90 days because online it will be denied again. BTW, the official informed me that my data on the web goes one way and those of the office… on the other.
What madness!