Tod Daniels I promised you an update as I sparked some confusion if it's possible to do 90-days notification online with passport acquired in the consulate in Thailand and without leaving the country (TM.6 card with old passport number). I did it once before and successfully did it again yesterday (application sent online yesterday evening and confirmation received right now, next day in the morning).

The timeline:

Jan 2020 - I flew to Thailand and didn't leave since then

Jun 2020 - Got new passport in consulate, stamp transfer (Immigration Division 1), 90-days notification in person

Sep 2020 - 90-days notification in person (I just forgot to do online when it was a right time)

Dec 2020 - 90-days notification online

Mar 2021 - 90-days notification by registered mail (website under maintenance)

Jun 2021 - 90-days notification online

Update on the online TM30 notifocation. I just came back to the country and used the TM30 app to notify, notification was successful but could not get the screenshot after notifying had to log via website and do a search of notification there, everything has recorded. Note that you can only search notifications on the website that are less then 7 days old, so screengrab.

Note for people who will use the app, point of entry choices are all in Thai only