Do I need to repeat the visa exemption stamp process when transferring to a new passport in Thailand?

When transferring your visa exemption stamp from your old U.S. passport to a new one, you do not need to repeat the entire process. There is a specific document from the U.S. Embassy that requests the transfer at the Thai immigration office. It is recommended to bring copies of all used pages of your old passport, as the process is generally simple and free. The new passport will receive a reference number linked to your old passport's data.