A. 1. Check Network Connection: Ensure you have a stable internet connection. Poor connectivity can cause messages to be sent multiple times. 2. Wait Before Resending: If a message fails to send, wait a moment before trying to resend it to avoid duplicates.

B. 3. Clear App Cache: Go to Settings > General > iPhone Storage > Securus and select 'Offload App' to clear any cached data that might be causing issues.