SAMUI - Current Domestic Travel Regulations
Ko Samui now only requires one of the following QR Codes to enter the island both by air and by ferries:
QR Code "𝐌𝐨𝐫 𝐏𝐫𝐨𝐦" For visitors who are completely vaccinated in Thailand with 2 doses of Sinovac / Sinopharm / Sputnik V or crossed for formula not less than 7 days OR for visitors who are vaccinated 1 dose with AstraZeneca / Pfizer / Moderna / Johnson & Johnson not less than 21 days.
QR Code "𝐒𝐚𝐦𝐮𝐢 𝐇𝐞𝐚𝐥𝐭𝐡 𝐏𝐚𝐬𝐬" Unvaccinated visitors need to show Samui Health Pass QR Code together with one of the following documents: ATK/RT-PCR test / Certificate of recovery from COVID-19 / Travel Certificate from Samui less than 2 days,
QR Code "𝐓𝐡𝐚𝐢𝐥𝐚𝐧𝐝 𝐏𝐚𝐬𝐬" - The Thailand Pass Qr Code is for visitors coming from abroad under Test & Go & Sandbox scheme. No other documents needed to enter Samui.
Source: COVID Center Ko Samui as of 15 Dec 2021