Documents Required and Instructions to Register Your Alphanumeric Sender ID in Pakistan

Before we begin

Due to regulatory requirements, there is sometimes a need for documents to be signed by customers to ensure that registrations are done on behalf of customers that have the right to use the Sender ID. This serves to ensure that traffic is coming from legitimate sources and minimizes any potential misuse.

This article outlines the documentation requirements for a pre-registration in Pakistan.

Things to note

The instructions below apply to registrations for Alphanumeric Sender IDs by companies based in Pakistan. If you are not based in Pakistan, these instructions will not apply to you.

Note: Registration is not required if the Domestic Entity is not planning to send more than 30,000 SMS/month


To register your Alphanumeric Sender ID, the Pakistan mobile network operators Mobilink, Telenor, Zong, Ufone and Warid require that you provide the following information:

  • Letter of Intent
  • Letter of Request

To get you up and running as quickly as possible, please fill out the document completely and accurately and provide any other required information. Use the examples provided for guidance. Note that mobile network carriers are very strict about the details! We highly recommend that you download the examples (hit right click, and select 'Save Image As...') and do a side by side comparison when you are filling out the documents.

Provide the signed documents

The signed documents authorize Twilio, Inc., to register and send branded SMS messages on your behalf.

Once you have downloaded the form, follow these general instructions: 

  1. Fill in the yellow highlighted fields—completely replace each field with your own information. If a field is not highlighted, don’t change it.
  2. If you have questions on how to fill in the required fields, refer to the annotated examples we provided for each field. 
  3. Have the documents signed by an authorized signatory of the Sender.
  4. In the green highlighted fields, add the Sender’s letterhead and/or logo, and sign where indicated.
  5. Upload the forms.

Required fields include:

  • Sender company’s letterhead
  • Date
  • Sender Company Address
  • NTN Number
  • Alphanumeric Sender ID requested
  • Sender ID Use Case
  • Sample message template(s)
  • Estimated Monthly Traffic
  • Name and Title of Authorized Signatory
  • Signature of Authorized Signatory
  • Sender Company Stamp





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