Maestro

Two options: 1. Do it before leaving home. 2. Upon arrival at the destination airport in Thailand, do it in the arrival hall, where facilities will be provided.

Yes, I think so,

Extract from https://tdac.immigration.go.th/arrival-card/#/home

Ectract from https://www.tatnews.org/2025/04/thailand-digital-arrival-card-system-set-to-launch-on-1-may-2025/

Ectract from https://www.immigration.go.th/

It is correct that an error message should pop up, but in your case the text of the message is wrong and it confused me, too, the first time I saw it because I had forgotten that the online TDAC form can be submitted only within a limited period prior to the arrival date. It should say something like "Please fill in this form not earlier than three days before your arrival". Perhaps even better, it should give you the actual date, "... not earlier than 4 May 2025"

Precisely.

In the current version of the online TDAC form, the fields for departure information are optional. One can proceed to the next page if they are left blank.

I listed Switzerland as my country of citizenship and a fictitious Thai mobile phone number, and I was able to proceed to the next page on the online form. https://drive.google.com/file/d/1QtvJw94t4eaNoaRsEVr8Q02Yryo560Qt/view?usp=drive_link

Because you have only a temporary permission to stay in Thailand, you are not a resident of Thailand for immigration purposes. As others have suggested, use your passport country.

Hooray, if Thailand is now on the list. Has the URL of the webpage been changed? On https://tdac.immigration.go.th/arrival-card/#/tac/arrival-card/add I still see no "THAILAND" between "TANZANIA" and "TIMOR-LESTE" https://drive.google.com/file/d/1VuL1dGRnIfpbxJDGtzu6R_rHS1nPYlj3/view?usp=drive_link and no "THE KINGDOM OF THAILAND" between "THE KINGDOM OF SWEDEN" and "THE KINGDOM OF TONGA" https://drive.google.com/file/d/1xEkXdEzsy9opNg3iYdT2G-U6UQG66AvC/view?usp=drive_link

Please see this post: https://aseannow.com/topic/1356064-thailand-digital-arrival-card-tdac-system-is-online-but-not-announced-as-starting-yet/page/10/#findComment-19712893

Your will receive the confirmation of your completion of the online TDAC form by email an attatchment in the form of a FDF document.

Please see the following: https://aseannow.com/topic/1356064-thailand-digital-arrival-card-tdac-system-is-online-but-not-announced-as-starting-yet/page/8/#findComment-19709723 https://www.tatnews.org/2025/04/thailand-digital-arrival-card-system-set-to-launch-on-1-may-2025/

I think it would not be a problem.