Thailand Letter of Authorization (LOA) guidelines

On this page, you will find details about the registration requirements for Thailand and guidance on completing the Letter of Authorization (LOA) form.

There are five networks in Thailand that support local and international traffic:

• AIS GSM (Advanced Info Service PLC)
• True Move H (Real Future)
• DTAC (Total Access Communications Co.)
• My network (by CAT)
• TOT Mobile

There are two types of number types used in Thailand:

• Non-DND (Do Not Disturb) numbers - If a person registers their number in non-DND, they will receive all kind of traffic types such as promotional, marketing or transactional.
• DND (Do Not Disturb) numbers - If a person registers their number in DND, they will only receive necessary traffic such as transactional or OTP.

Registration requirements

Before you begin, check the basics of Thailand coverage, restrictions, and current regulations.

To register senders in Thailand, adhere to and submit the following requirements.

Sender requirements:

• Allowed special characters are: . * % ! & ( ) - : ' @ # ; _ $. The first character of the Sender ID should not be one of those mentioned, and any unspecified characters will be converted to #
• Space characters are not allowed in the AIS Network
• Sender name should not be longer than 11 characters
• Generic senders are not allowed

Registration requirements:

• Company website
• Company (entity) name
• Company headquarter
• Content sample
• Type of traffic (transactional/OTP/promotional, etc.)
• Proof of ownership for numeric senders only (for those not acquired through Infobip)

The LOA is a crucial document in the SMS sender registration process in Thailand which helps verify the legitimacy of the sender, ensures compliance with regulations, and establishes accountability.

To expedite the registration of your sender, please ensure you download and complete the LOAs thoroughly and accurately:

Client to Infobip LOA (opens in a new tab)
Whitelist Letter (opens in a new tab)

Client to Infobip LOA

1. Company letterhead and footer.
2. Date.
3. Company name.
4. Company and representative details.
5. Details of the sender that you will register.
6. Representative signature with the company stamp.

Whitelist Letter

1. Company letterhead.
2. Date (month, day, year).
3. Company representative name and their position.
4. Company name.
5. Sender name that you will register and sample template.
6. Details on how the end user will receive the sender name.
7. Company representative signature with company stamp and representative details.

Once all requirements and documents are completed, you can:

• Direct customers (end customers) - start the Sender ID registration process here (opens in a new tab), and click the Request Sender button under Alphanumeric Sender ID. Provide the necessary details and submit the request.
• Wholesales/partner - contact [email protected] and your dedicated account manager, and provide the documents along with the required sender information.