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WhatsApp Business Messaging Policy (Meta, 2026)
source.business-whatsapp-com.policy-2026 ↗
Meta's official WhatsApp Business messaging policy page, confirming the 24-hour customer service window mechanics and a pricing-model change effective October 1, 2026: service messages and utility messages sent inside the 24-hour window move to per-message pricing (previously free within the window).
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