How can I cancel my Non-O visa from outside Thailand before it expires?

The user inquires about the process of canceling their Non-O visa while residing outside Thailand, as their visa expires soon. Responses indicate that cancellation is not required for a Non-O visa, as it automatically becomes void upon expiration. However, if the visa was part of a stay extension, it should be canceled in person prior to leaving Thailand. It's clarified that cancellation is not possible from abroad and that an explanation may be required if any issues arise in the future.