Should I notify Chiang Mai Immigration after a border run with a 6-month METV?

The user is in Chiang Mai on a 6-month Multiple Entry Tourist Visa (METV) and plans to do a border run at Mae Sai when their 60-day period expires. They are asking whether they need to notify the Chiang Mai Immigration office upon their return or if they can remain silent. Responses suggest that it might not be necessary to notify Immigration, but it's advisable to check if your accommodation handles the notification or if it needs to be done personally for a new date stamp and TM 6 departure card.