Do I need to go to the immigration office in person for a 60-day extension or can I send someone on my behalf?

To close the loop for a 60-day extension, you typically need to go to the immigration office in person, as the stamp indicates that the "applicant" must return on a specified date. However, it is advisable to contact your specific immigration office for clarification, especially considering that policies may vary across the 70+ immigration offices in Thailand.