Do I need to inform immigration if I leave Thailand within 90 days on a Non-O visa for visiting family?

The user asks if it's necessary to notify immigration when leaving Thailand within the 90 days while on a Non-O visa for family visits, and whether there would be any issues applying for another Non-O visa for the same reason later, with plans to extend based on marriage. Responses indicate that while theoretically a TM30 should be filed, practically no action is needed if leaving on time. Applying for another Non-O visa later, either from their home country or in Thailand, poses no problems.