For the complete documentation index, see llms.txt. This page is also available as Markdown.

Customer consent (opt-in)

Before you message a customer on WhatsApp first, you need their consent. This is a Meta requirement: marketing templates may only be sent to people who have explicitly agreed to receive messages.

Consent is not “turned on” anywhere in the product — the platform does not store or verify it. Collecting it, keeping a record, and being able to prove it is the business’s responsibility.

Who is responsible

Responsibility for obtaining valid consent rests with the platform customer. This is stated in our terms: the user is responsible for complying with WhatsApp Business Terms, Meta policies, anti-spam laws, and marketing communication rules.

1MSG does not influence Meta’s decisions — not account approval, not sending limits, not quality rating, and not blocks.

What you must not do

Using the service prohibits:

  • sending unsolicited or unlawful messages;

  • working with purchased or unauthorized contact lists;

  • violating applicable anti-spam laws;

  • circumventing opt-in requirements;

  • engaging in misleading communications.

Messages to people who did not expect them lead to spam complaints. Consequences come from Meta’s side:

  • the number’s quality rating drops;

  • sending limits are reduced;

  • the number may be restricted or blocked.

Explicit consent lowers the risk of complaints and helps avoid a number block.

How this relates to the 24-hour window

Until the customer messages you first, the window is closed — the first message is sent as a template. When the customer replies, the window opens, and you can continue with free-form text.

What’s next

  • 24-hour conversation window — when you can send free-form text

  • Privacy Policy

  • User Agreement

  • Creating and sending templates

  • Meta’s opt-in rules — the primary source; details change on Meta’s side

Last updated