The Documentation Hub

Welcome to Kaleyra Documentation Hub. You can find comprehensive API docs, integration guides and docs to getting you started. In case you're stuck, refer to the docs here and you're good to go

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Opt in Documents

Submitting a valid Opt in Document is necessary for your business to use our SMS & Voice services. Without an approved Opt in Document, your services cannot be activated.

What is an Opt in Document?

Opt-In can be a signup form, paper form or any digital record which can serve as a proof
that the customer agreed on terms and conditions to receive SMS notifications from your business entity.

Why do we need an Opt in as a part of On boarding process?

  • Opt in is a document that enables us to understand the source of acquisition of your contacts.
  • This ensures that when we send SMS or initiate calls to the user, we maintain 100% compliance to regulatory guidelines.

Opt In Document Format

Businesses can submit documents in both online or offline formats.

  1. For online documents, the URL of the Sign up/ Subscription form is mandatory
  2. For offline documents, the seal of identity is mandatory.

The following image depicts the type of subscription that businesses from various industries provide:

The following is the right format of an online opt in document.


Opt in Documents


Submitting a valid Opt in Document is necessary for your business to use our SMS & Voice services. Without an approved Opt in Document, your services cannot be activated.

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