What should I do about TM30 registration for my son arriving in Thailand on July 15th, considering Immigration is closed on the 16th?

A TM30 registration is required for foreign nationals staying in Thailand, reflecting their current address. In this scenario, since your son arrives on July 15th and Immigration is closed on the 16th, it is advisable to seek alternative options for completing the TM30 registration, such as checking if online registration is available or if you can submit the form immediately upon opening.