On Monday, I plan to visit the BOI located in Chamchuri to obtain the necessary letter for the cancellation of my visa. Ideally, I would prefer to handle this process at the immigration office within the same building. However, my registered address is in Samut Prakan, where I have also been fulfilling my 90-day reports. This raises the question: Am I truly required to make the extensive journey to the Samut Prakan office, or can I conveniently proceed to the nearby immigration office within the Chamchuri building to accomplish the visa cancellation?