Country-specific requirements for text messaging

In this article, you'll learn about some of the country-specific requirements for text messaging.

This article covers the following countries:

• Singapore

Singapore

To send messages in Singapore, you must register your sender ID with the Infocomm Media Development Authority (IMDA). Text messages sent to Singapore from cell numbers or international numbers will behave as follows:

• From January 30, 2023, unregistered sender IDs default to "likely-SCAM" for a transition period of approximately six months.
• After the transition period, all messages from unregistered Sender IDs are permanently blocked and not delivered.

This is due to the IMDA implementing a "Full SMS Sender ID Registry Regime (SSIR) " in Singapore. The IMDA’s decision impacts all A2P messaging service providers in Singapore.

Preparing to register your sender ID

As required by IMDA, you need a "Singaporean corporate registration number" (UEN or "Unique Entity Number") to register Sender IDs on the SSIR portal. You can check the Bizfile+ website to find out if you have a UEN.

If your company is not incorporated in Singapore, you can obtain a Singapore UEN by registering with the Accounting and Corporate Regulatory Authority (ACRA), or use an affiliated company that has a UEN to register Singapore mobile numbers on the SSIR portal.

Provide the following two letters when registering your Singapore Mobile Number(s) on the SSIR portal:

• A letter from Twilio's carrier partner to Twilio.
• A letter from Twilio. You can request that using the Request for Letter from Twilio for registration of Singapore Mobile Numbers form.

If you have questions regarding the registration on the SGNIC portal process, contact the Singapore Network Information Centre (SGNIC) at [e-mail] or visit the SGNIC website.

Registering your sender ID

After registering your sender ID in the SSIR portal, work through the following steps to register the sender ID with the telecommunication carriers in Singapore.

1. Download the required forms (Singapore_SenderID_Files.zip).
2. Unzip the downloaded file. You'll see the following file structure:

   

3. Fill out a letter of authorization (LOA). Choose the one that's applicable to your case (the title will help you choose). Then, add the required document to each folder:

   • ACRA Bizfile Report showing said UEN that is no more than three months old
   • Proof of registration with SSIR
   • Singapore UEN used to register the sender ID(s) with SGNIC
4. Convert the required forms and documents into .PDF, then compress them into a single zip file. The file must not be larger than 3 MB.
5. Enter the required information into the Sender ID registration form.
6. After completing all of these steps, contact Zendesk Customer Support to process your data. Attach the single zip folder to your request, and include your Zendesk subdomain.