Which code should be used to specify an unneeded service to cancel?

The correct choice for indicating an unneeded service to cancel is represented by the code 10-80. This code is specifically designated for the situation where a service or assistance is no longer required, allowing communication to remain clear and effective within the operational context of law enforcement.

Using the correct code is crucial for ensuring that all personnel are informed and can coordinate effectively. When an officer needs to cancel a previously requested service, using the designated code helps prevent unnecessary responses and enables resources to be allocated efficiently where they are needed most.

The other codes presented are associated with different meanings, making them inappropriate for indicating an unneeded service. It's essential for those in the NYPD and related agencies to understand and use the correct codes to facilitate smooth communication and operational efficiency.