What documents are needed for visa extension in Thailand after receiving a new passport?

When extending your OA visa after obtaining a new passport, you will need specific documents. According to a community response, once you have your new passport stamped with the transfer of your visa, you do not need to present your old passport or copies of previous extensions anymore. You will need to provide a copy of the data page of your new passport, a copy of the transfer stamp, a copy of your last extension stamp, and all other required documentation such as bank statements and insurance.