Here's how to collect WhatsApp numbers legally in 2025:
I. Understand the Core Legal & Platform Requirements
Freely Given: Users must provide consent voluntarily, without coercion. Pre-checked boxes are not allowed.
Specific: Consent must be for WhatsApp messaging specifically. While some interpretations of Meta's November 2024 policy update suggest a general SMS opt-in might suffice if complying with whatsapp number list all local laws, it is safest and best practice to obtain explicit consent specifically for WhatsApp.
Informed: Users must clearly understand what kind of messages they will receive (e.g., "promotions," "order updates," "customer service notifications") and how often.
Unambiguous: The language used must be clear, straightforward, and easy to understand.
Expressed: Users must take an affirmative action (e.g., clicking a button, typing a keyword).
Granular: If you plan to send different types of messages (transactional vs. promotional), ideally get separate consent for each category.
Compliance with WhatsApp Business Messaging Policy:
No Unsolicited Messages: You cannot send any messages to users who have not opted in.