@Graham *****
I think I read the wrong information as I just read it again on the website, I do state 15 days before and up to 7 days after but I think this is in-person, when I clicked to link for online report it does as you say only say 15 days in advance. Noted for next time. It didn't cost anything to do it in the office but cost me 1500thb as it's right next to the fresh fish market and we came home with lots of crab,shrimp and squid.