Which term refers specifically to only the transfer of radar identification?

The term that refers specifically to the transfer of radar identification is "Point Out." In air traffic control, a Point Out is a procedure used when one controller needs to inform another controller about an aircraft's radar identification without handing off the control of that aircraft. This allows the second controller to be aware of the aircraft's position and intentions without taking responsibility for its separation at that moment.

Control Transfer typically involves not just identification but also the responsibility for controlling the aircraft as it moves from one controller to another. Ident Transfer and Radar Handoff are closely related to moving radar identification between controllers, but they usually imply a more comprehensive transfer of control and responsibilities. Point Out is distinct in that it is more about notification and awareness rather than transferring control.