What counts as valid opt-in
- User knowingly provides their number and agrees to WhatsApp messages.
- Opt-in language states purpose (e.g., updates, offers) and frequency.
- Channel-specific consent (WhatsApp) is clearly indicated.
WhatsApp Business API opt-in rules
Opt-in requirements for WhatsApp Business API and how to collect consent properly.
Opt-in rules for WhatsApp Business API require clear consent, transparency on what you’ll send, and an easy way to opt out.
Key takeaways
- Obtain explicit opt-in before sending proactive messages.
- Explain what users will receive and how often.
- Provide simple opt-out options and honor them immediately.
Related guides worth reading next
Strengthen this topic cluster by also reading What is 24-hour rule in WhatsApp Business API?, WhatsApp Business API session window.
Where to capture opt-in
- Website forms and checkouts with a WhatsApp-specific checkbox.
- In-store or event forms where consent text is visible.
- Click-to-WhatsApp ads that describe what the user will receive.
Managing opt-outs
- Honor “stop” or similar keywords promptly.
- Provide an easy way to unsubscribe in campaigns.
- Keep consent logs (source, timestamp) for compliance.
FAQs
Is generic consent enough?
No. Consent must be specific to WhatsApp and describe what will be sent.
Do I need double opt-in?
Not required, but confirming via WhatsApp can improve list quality.
Can I message users who chatted with my ad?
Only within the 24-hour service window unless you have explicit opt-in to send templates later.
Explore more WhatsApp Business API resources
Messaging Rules and Compliance
What is 24-hour rule in WhatsApp Business API?
Definition of the service window and what you can send inside or outside 24 hours.
Messaging Rules and Compliance
WhatsApp Business API session window
Session basics, triggers, and best practices for timely replies.
Messaging Rules and Compliance
Can we send message after 24 hours?
Using templates to restart conversations after the service window closes.
Messaging Rules and Compliance
WhatsApp Business API message limits
Messaging tiers, quality signals, and tips to increase limits.
Try BotMax AI
Launch WhatsApp automation with compliant messaging
Verified templates, inbox for teams, broadcasts, reminders, and billing workflows.