diff --git a/internal/nwucp/handler/handler.go b/internal/nwucp/handler/handler.go
index 4fe45a8..ece5b2b 100644
--- a/internal/nwucp/handler/handler.go
+++ b/internal/nwucp/handler/handler.go
@@ -26,6 +26,7 @@ func HandleRegistrationAccept(n3ueSelf *context.N3UE, nasMsg *nas.Message) {
 	naslog.Tracef("Get Registration Accept")
 
 	n3ueSelf.RanUeContext.DLCount.AddOne()
+	n3ueSelf.GUTI = nasMsg.GmmMessage.RegistrationAccept.GUTI5G
 
 	// send NAS Registration Complete Msg
 	pdu := nasPacket.GetRegistrationComplete(nil)
diff --git a/internal/nwucp/handler/send.go b/internal/nwucp/handler/send.go
index 09f2eba..09064e4 100644
--- a/internal/nwucp/handler/send.go
+++ b/internal/nwucp/handler/send.go
@@ -7,9 +7,11 @@ import (
 	"github.com/free5gc/n3iwue/internal/packet/nasPacket"
 	"github.com/free5gc/n3iwue/internal/packet/ngapPacket"
 	"github.com/free5gc/n3iwue/internal/security"
+	context "github.com/free5gc/n3iwue/pkg/context"
 	"github.com/free5gc/n3iwue/pkg/factory"
 	"github.com/free5gc/nas"
 	"github.com/free5gc/nas/nasMessage"
+	"github.com/free5gc/nas/nasType"
 	"github.com/free5gc/openapi/models"
 )
 
@@ -60,3 +62,14 @@ func SendPduSessionEstablishmentRequest(ue *security.RanUeContext,
 	naslog.Tracef("send nas complete")
 	return nil
 }
+
+func SendDeregistration() {
+	n3ueContext := context.N3UESelf()
+	mobileIdentity5GS := nasType.MobileIdentity5GS{
+		Len:    n3ueContext.GUTI.Len,
+		Buffer: n3ueContext.GUTI.Octet[:],
+	}
+	deregistrationRequest := nasPacket.GetDeregistrationRequest(0x02, 0x01, 0x00, mobileIdentity5GS)
+
+	SendNasMsg(n3ueContext.RanUeContext, n3ueContext.N3IWFRanUe.TCPConnection, deregistrationRequest)
+}
diff --git a/pkg/context/context.go b/pkg/context/context.go
index b9cba2d..f0569be 100644
--- a/pkg/context/context.go
+++ b/pkg/context/context.go
@@ -47,6 +47,7 @@ type N3UE struct {
 	CreatedIface         []*netlink.Link
 	CurrentState         chan uint8
 	Kn3iwf               []uint8
+	GUTI                 *nasType.GUTI5G
 
 	// Temporary data , used to create GreTunnel
 	TemporaryXfrmiName string
diff --git a/pkg/service/init.go b/pkg/service/init.go
index f76cce0..bad5509 100644
--- a/pkg/service/init.go
+++ b/pkg/service/init.go
@@ -12,6 +12,7 @@ import (
 	"github.com/vishvananda/netlink"
 
 	"github.com/free5gc/n3iwue/internal/logger"
+	nwucp_handler "github.com/free5gc/n3iwue/internal/nwucp/handler"
 	"github.com/free5gc/n3iwue/internal/util"
 	context "github.com/free5gc/n3iwue/pkg/context"
 	"github.com/free5gc/n3iwue/pkg/factory"
@@ -45,6 +46,7 @@ func Start() {
 		}()
 
 		<-signalChannel
+		nwucp_handler.SendDeregistration()
 		Terminate()
 		time.Sleep(2 * time.Second)
 		os.Exit(0)