What is the 90-day reporting requirement for foreigners in Thailand, especially for those on a DTV visa?

It is compulsory in your case, and just because you managed to enter and exit without any questions about it once, doesn't mean you'll be able to do it again. Any documentation you may later require from the immigration while in Thailand could result in fines for not updating it... Better getting it updated from now and paying the fine if any.

Some immigration offices want proof of the TM47 in the requirements for an extension per recent posts from people going through the process.

The 90-day reporting requirement in Thailand is indeed a mandatory regulation for all foreigners residing in the country, including those on a DTV.

Why It Might Not Be Enforced at Borders: Immigration at borders primarily checks for visa validity upon entry and exit. The 90-day report is an internal process to keep track of where foreigners are residing in Thailand. Therefore, unless you're renewing your visa or interacting with immigration for other reasons, this might not come up.

Consequences: If you need to interact with immigration for any reason (like visa extensions, changing visa status, or even if there's a future crackdown on non-compliance), not having your 90-day reports up to date can cause issues.

Action to Take: Even if it feels like it's only enforced online, it's safer to comply. You can report in person at an Immigration Office, or after the first in-person report, you can often do subsequent reports online or through mail.

Community Awareness: The online community, including forums like this often highlights these requirements because they've experienced or heard of others facing consequences for non-compliance, even if sporadically enforced.

Remember, just because something isn't strictly enforced doesn't mean it's not required by law. Compliance helps avoid potential future complications. 🙏

Assuming you haven't been to a Thai immigration office?