Method and appartus for notifying authenticity information of caller identity in wireless access system

An apparatus for notifying authenticity information of a caller identifier (ID) in a wireless access system, the apparatus comprising:

• a receiver;
• a transmitter;
• and
• a processor supporting the notifying authenticity information,
• wherein the processor is configured to:
• receive, via the receiver from a second network node, a first call message including a caller ID of a second user equipment (UE2);
• determine whether the caller ID of UE2 has been authenticated or not by detecting authentication information in the first call message;
• and
• transmit, via the transmitter to a first user equipment (UE1), a second call message including the caller ID and an indication message indicating one of authentication levels out of an authenticated, a spoofed, or an unauthenticated level,
• wherein the authenticated indicates the caller ID is authenticity and the spoofed indicates the caller ID is not guaranteed to correspond to the UE2.