What are the current procedures for transferring a visa to a new passport in Thailand?

The conversation discusses the process of transferring a visa or extension of stay to a new passport in Thailand, particularly emphasizing the need to visit an immigration office for this procedure. Users share their experiences and clarify that although some have successfully transferred visas at borders or airports, recent enforcement of new rules suggests that transferring at immigration is the more reliable method. It's noted that two forms are required and that the process can take varying amounts of time depending on the immigration office.