You maybe right, Just checked my 2nd PCR test and it says not detected, but no Email.
Maybe that's sent to the hotel for them to print out, I believe I need a paper when checking out to move about Thailand.
What I don't get is, you HAVE to stay in the sandbox scheme for 7 days/ nights , but my day 5 is negative, so what's the reasoning in staying the extra 2 days ?
Maybe a 5 day sandbox is the way forward.