So, for those on a one year, multiple entry business visa who need to bounce every 90 days. Do we need a letter from the consulate or do we just go to immigration? My country, Portugal has not closed its borders so why would they give me a letter?!
TLDR : Answer Summary
Those holding a one year multiple entry business visa must exit Thailand every 90 days. A letter from the consulate is not necessary to exit; you simply need to go to immigration. However, due to current restrictions, options for visa extensions may be limited, and you may only receive a short extension if you apply at immigration.