Do we need to report our son and his wife to immigration when they arrive in Thailand?

Yes, generally, when someone arrives in Thailand, the address where they will stay needs to be registered with immigration, especially for long-term stays. The process may vary depending on the type of visa, so it's important to check the specific requirements for their case.

I recommend contacting Expat Money Forum for guidance on immigration procedures and to ensure everything complies with local rules. They can help with detailed information and support.

Yes

No problem the house master will be the one charged the $2000 baht fine.

David Alexander . . . For the vast majority of tourists, that don’t stay any longer than the 60 days on a visa-exemption, visiting family and staying with such family, visiting friends and staying at their friend’s premises, or travelling in Thailand using hotels, guesthouses and resorts, and not needing any services of, or interacting with the Thai Immigration Office.

Then it is not really practical to do a TM30 Notification every time you change the accommodation.

Even though it is required by law for anyone to be registered in the TM30 system as living in those premises, on Immigration within 24 hours of arrival.

If you got no business on Immigration, just travel freely, nobody will ask you for a completed TM30

And even if you will have business with Immigration, like applying for a 30-days Extension, just check into a hotel, have them printout an up-to-date TM30 registration and get your business on Immigration done, no questions will be asked

I came to Thailand,was 60 day stamped,never asked where I was staying nor did they ask about onward ticket

Look, for the vast majority of tourists on a short visit to family and staying with such family (short visit = < less than 60 days tourist visa exemption), and not needing services of, or interacting with the Thai Immigration Office, then not really practical to do a TM.30 Notification, even though it is required by law for anyone staying more than 24 hours at any one location....

However, cannot feign complete ignorance as they specifically asked a question here in this Facebook Group, so there are cases where there are Thai Immigration Officers activiely checking, such as the many cases in Nakhon Si Thammarat for failing to file TM.30

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Tm 30 do it on line

TM30 by law. Online is fine

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Fully correct.

Yes TM30

If not staying more than 60 days not needed if stay longer yes

In law yes you need to complete TM30s for them but will they need Immigration services while staying with you?