How should you respond to a Code 20?

• A. Give your full name
• B. With your serial number only
• C. Stay silent
• D. Explain the situation

Answer: (B)

When Code 20 is called, the priority is to verify your identity quickly and securely without cluttering the radio or sharing unnecessary personal details. Responding with your serial number only provides a concise, official identifier that the dispatcher can cross-check against the roster. This confirms who you are and your status in the scene, enabling rapid coordination and follow-up if needed while keeping radio traffic efficient. Giving a full name adds unnecessary time and exposure; staying silent leaves the dispatcher without the needed confirmation; explaining the situation goes beyond what the Code 20 request requires and can reveal more information than necessary. So, identifying yourself with your serial number alone is the most appropriate response.