Glossary
Explicit permission a customer gives before a business may message them on WhatsApp.
A WhatsApp opt-in is the consent a person provides allowing a business to contact them on WhatsApp. Meta requires businesses to collect opt-in before sending template messages, and the consent must make clear that the user agrees to receive WhatsApp messages from that specific business.
Opt-in can be collected almost anywhere: a website checkbox, a form, an SMS or email confirmation, an in-store sign-up, or a chat where the user messages first. The key is that consent is unambiguous and recorded.
Without proper opt-in, businesses risk blocks, low quality ratings, and account restrictions, because WhatsApp users can report unwanted messages with a single tap.
Opt-in is both a Meta policy requirement and the difference between a healthy number and one that gets blocked — it protects your sending reputation.
Defuser AI captures and logs opt-in through forms, Link in Bio, and chat entry points so your WhatsApp Business API sending stays compliant.
Explicit permission a customer gives before a business may message them on WhatsApp.
Opt-in is both a Meta policy requirement and the difference between a healthy number and one that gets blocked — it protects your sending reputation.
Start free in minutes — no code, no credit card. Connect WhatsApp, Instagram, Messenger and TikTok in one platform.
Start for Free →
DEFUSER