If outgoing messages are failing, check these in order:

1. 1. Go to Settings → Integrations → WhatsApp and check connection status
2. 2. If status shows "Disconnected," click "Reconnect"
3. 3. Verify your Meta Business Account at business.facebook.com is active
4. 4. Check if you've exceeded the daily message limit (new accounts: 250/day)
5. 5. Ensure the patient's number is a valid WhatsApp number

If your WhatsApp number shows as "Not Verified":

1. 1. Ensure the number is not currently registered with regular WhatsApp
2. 2. The number must be able to receive SMS or voice calls for OTP
3. 3. Try the "Voice Call" OTP option if SMS is not received
4. 4. Wait 24 hours if you've exceeded OTP retry limits
5. 5. Contact support if the number was previously used with another WhatsApp Business API provider

Meta assigns a quality rating (Green, Yellow, Red) based on patient feedback. If your rating drops:

1. 1. Review recent messages for overly promotional or spammy content
2. 2. Reduce message frequency — don't send more than 2 messages per day per patient
3. 3. Ensure patients are opting in before receiving messages
4. 4. Check that message templates comply with Meta's policies
5. 5. A red rating can temporarily limit your messaging — focus on quality to recover

Meta requires business verification for WhatsApp Business API access. If verification is failing:

1. 1. Ensure your business name matches official registration documents
2. 2. Upload clear, legible copies of registration certificates
3. 3. Your business website must be live and match the registered business name
4. 4. Respond promptly to Meta's verification emails or requests for additional documents
5. 5. Verification typically takes 2-5 business days — avoid resubmitting during this period