Why is my WhatsApp message not delivered?

A message that does not arrive almost always has a simple cause. Here are the most common, in the order to check them.

• The number is badly written: it needs the country code, without the leading 0 (for example 237…).
• The person does not have WhatsApp, or not that version of the account.
• The 24-hour window is closed: with no customer message for over 24 hours, only a Meta-approved template can go out.
• The template used is not approved, or its category does not fit.
• The recipient blocked you or has receiving restrictions.
• Your number has reached its daily sending limit.

In WhatzAI

The error returned by Meta is shown with the message. For a campaign, contacts outside the window without an approved template are skipped instead of being sent by force.