Can I fly to Koh Samui without my passport while waiting for my ED visa to be processed?

The user is concerned about traveling to Koh Samui without their passport while their ED visa is being processed. They inquire whether they can use other forms of identification, like an international driving license or a domestic ID from France. Commenters clarify that a Thai driving license or a pink ID card can be used for domestic travel in Thailand, but there are concerns about hotel check-in and required documentation for travel. One user suggests that usually, immigration provides a receipt or acknowledgment when they hold onto your passport, which the original poster does not have.