I did the border run two months ago... I had recently obtained the "yellow book" and "pink ID card"....I thought this established my residence... not so..... when I went to immigration a couple days ago to obtain the 30 day extension... I was told that I had needed to do the TM30 upon my return... 800 Baht fine... plus the 1900 Baht for the extension... at least I did get my extension ..
TLDR : Answer Summary
A user shared their experience of doing a border run and learning about the requirement to file a TM30 upon re-entry into Thailand, which resulted in unexpected fines despite having a yellow book and pink ID card. The conversation sparked various comments about the usefulness of these documents, their role in legal requirements, and their practical applications, such as for driving licenses and hospital services. Others shared similar experiences regarding fines and importance of TM30 for foreigners.