Having just done a border bounce via mukdahan to Laos I contacted my local immigration office in Kamphaengphet via their Line app and asked if I should go in to register TM30 again, just had reply after a couple of days to say to go into their office again, I registered with them a few days after my first arrival in December, I’ve been to Kamphaengphet immigration a few times, it’s a newish big office usually very quiet beside the AH1 highway,.