To clarify: How / where to do (the first) 90 day report if living on an island (without immigration office / say e.g. Koh Tao)? Online seems to be down for months now / and anyhow not applicable for the first 90 day report? I read somewhere that alternatively reports can be filed with the local police office (but some people disagreed). Sending in mail to Bangkok seems error-prone. Do they really expect me to do a costly day-trip (e.g. to Koh Samui) just to do a senseless 5 minute 90-day report? Thanks for sharing your experience.
TLDR : Answer Summary
This discussion addresses the challenges of filing a first 90-day report for expats living on an island like Koh Tao, where there is no local immigration office. Users clarify that the report must be filed at the immigration office for the area or by sending it via registered mail. Traveling to a nearby island or city, such as Koh Samui, to file the report has been suggested due to the unavailability of online reporting for the first report. The conversation highlights frustrations with bureaucratic processes in Thailand and the lack of current information on official websites.