Is your PT33 prescription genuine?

Start with the consultation, not the paper

Most people asking this question are looking at a document and trying to read it like a banknote, hunting for a watermark. That is the wrong end of the problem. A prescription is a record of a decision a practitioner made about you. If no one made that decision, there is nothing for the paper to be a record of, and how convincing it looks changes nothing.

So the useful question is not what the form looks like. It is whether you can answer three things: who assessed you, where they work, and what they actually asked you. A genuine route leaves you able to answer all three without effort.

The patterns worth walking away from

These are patterns, not accusations about anyone in particular. Treat them as reasons to slow down and ask a question, not as proof of anything.

• A prescription appears with no assessment of any kind, only a payment.
• Nobody will tell you the name of the practitioner who issued it, or where that practitioner works.
• The form arrives already signed, with the details filled in afterwards or left for someone else to complete.
• You are told a prescription can be arranged for you as part of the purchase, rather than by a practitioner who examined you.
• A document reaches you by post or a messaging app with no consultation behind it at all.

None of this is about how the paper looks. It is about whether a practitioner made a decision about you, and whether you can find that practitioner again.

What verification will look like, and what it does not look like yet

The director of the Medical Cannabis Division described a system officials will use to verify document codes and trace a prescription back to the practitioner and facility that issued it in real time, flagging duplicate codes, invalid records, or practitioner details that do not match.

That was described in June 2026 as strengthening future enforcement. As of August 2026 it is a capability for officials, not a public lookup, and there is no code you can type into a website to confirm your own prescription. Anyone offering to check one for you is not using an official system. This is worth saying plainly, because a page that implies you can verify a code today would send you looking for something that does not exist.

If you encounter what looks like a fake medical certificate or an illegal PT33 sale, the Medical Cannabis Division has asked the public and businesses to report it through the Traffy Fondue application or the hotline 02-257-7042.

Official sources

The rules described in this guide are based on these primary references:

Practices and prohibitions under the Controlled Herb (Cannabis) Announcement B.E. 2568 (2025), official guidance published by Thailand's Government Public Relations Department (in Thai). The announcement was published in the Royal Gazette on 25 June 2025 and has been in force since 26 June 2025.

Division of Medical Cannabis, Department of Thai Traditional and Alternative Medicine, the regulator's official portal for current rules, licensing, and announcements (in Thai).

The June 2026 enforcement statements quoted above, including the reporting channel, are reported by Khaosod English, 27 June 2026. That is a news outlet rather than a government source, and it is named here so you can weigh it yourself.