Block and Report Rate
This is the most critical factor, based on user feedback during outbound conversations.
What happens: If a high percentage of recipients click "Report" or "Block" within a short window, the security algorithm preemptively suspends the account.
Risk Scenarios: This can occur in outbound campaigns or ads with poor targeting. If an ad is shown to the wrong audience, there is a high risk of being reported.
The Logic: A block implies the message was unsolicited (Invalid Opt-in). This is rarely seen with users who already have an ongoing relationship with your business.
Cadence and Volume Disruptions
Accounts showing sudden spikes in activity may trigger restriction warnings.
Frequency: Sending a high volume of messages in just a few minutes is considered "non-human" behavior.
For large databases, it is vital to schedule and stagger (cadence) blasts throughout the day.
Initiating Conversations: Starting hundreds of chats with numbers that do not have your contact saved is a classic spam signal. WhatsApp prioritizes two-way (bi-directional) engagement.
Focus on customers who already interact with you to build platform trust.
Warm-up for New or Migrated API Accounts
Warm-up is vital for building trust with the WhatsApp platform.
Avoid: Registering a number today and attempting to send 2,000 messages tomorrow.
Limits: New API accounts have messaging limits upon creation. These limits are tied to Display Name approval and the platform's "good practice" of gradual volume increases.
Conversational Content & Template Best Practices
While messages are encrypted, the system analyzes:
Content Quality: Ensure high-quality content that complies with WhatsApp's Commerce Policies and Terms of Service.
Hash Similarity: Sending identical text/images to thousands of people makes the file "hash" known. If that hash is linked to reports elsewhere, your account may fall due to "pattern association."
Forwards: Messages forwarded many times (double-arrow icon) are treated with extreme caution.
Limits and quality on the API
⚠️ Warning: Darwin does not allow connecting lines with WhatsApp Coexistence because of Meta failures that have not been fixed yet (the API may reject replies even when the message arrived, and messages sent from WhatsApp for Windows never reach the AI). The limits in this section apply to API connections.
Template Rating: If a template’s quality drops, it is paused. Repeatedly sending rejected templates leads to account-wide restrictions.
Messaging Limits: The API uses Tiers (1k, 10k, 100k messages per 24h). Attempting to bypass these via multiple numbers under the same Tax ID without authorization results in a ban.
Scale: If your account has high quality, an approved Display Name, and a Verified Business Manager, you can request limit increases via our Meta Champion and internal support tickets.
Account Best Practices
Business Manager: Complete the Business Verification process. Ensure your website footer contains legal info and the brand name matches the WhatsApp Display Name.
Active Opt-in: Add "Accept" and "Decline" buttons to templates. Inducing users to click "Unsubscribe" is far safer than them clicking "Block."
Personalization: Use variables ({{name}}, {{order_id}}). This changes the message hash and builds trust.
Contextualization: Avoid direct links in the first message. Ask a question first to establish a "Safe Connection."
Ad Campaigns: If you lack a customer base, use precise targeting to reach the most relevant profile and avoid negative feedback.