diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8660a1b2123..1dc8c0f7418 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -74,6 +74,7 @@ Here is an overview of all new **experimental** features:
 
 - **General**: Centralize and improve automaxprocs configuration with proper structured logging ([#5970](https://github.com/kedacore/keda/issues/5970))
 - **General**: Paused ScaledObject count is reported correctly after operator restart ([#6321](https://github.com/kedacore/keda/issues/6321))
+- **General**: Revise some annotations above function and fix fallback check bug ([#6346](https://github.com/kedacore/keda/pull/6346))
 - **General**: ScaledJobs ready status set to true when recoverred problem ([#6329](https://github.com/kedacore/keda/pull/6329))
 
 ### Deprecations
diff --git a/apis/keda/v1alpha1/scaledobject_types.go b/apis/keda/v1alpha1/scaledobject_types.go
index 37c5e640963..74a0cc030d1 100644
--- a/apis/keda/v1alpha1/scaledobject_types.go
+++ b/apis/keda/v1alpha1/scaledobject_types.go
@@ -21,10 +21,21 @@ import (
 	"reflect"
 	"strconv"
 
+	eventingv1alpha1 "github.com/kedacore/keda/v2/apis/eventing/v1alpha1"
+	"github.com/kedacore/keda/v2/pkg/common/message"
+	"github.com/kedacore/keda/v2/pkg/eventemitter"
+	"github.com/kedacore/keda/v2/pkg/eventreason"
+
 	autoscalingv2 "k8s.io/api/autoscaling/v2"
+	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	logf "sigs.k8s.io/controller-runtime/pkg/log"
 )
 
+var scaledobjecttypeslog = logf.Log.WithName("scaledobject-types")
+
+var EventEmitter eventemitter.EventHandler
+
 // +genclient
 // +kubebuilder:object:root=true
 // +kubebuilder:subresource:status
@@ -237,7 +248,7 @@ func (so *ScaledObject) IsUsingModifiers() bool {
 	return so.Spec.Advanced != nil && !reflect.DeepEqual(so.Spec.Advanced.ScalingModifiers, ScalingModifiers{})
 }
 
-// getHPAMinReplicas returns MinReplicas based on definition in ScaledObject or default value if not defined
+// GetHPAMinReplicas returns MinReplicas based on definition in ScaledObject or default value if not defined
 func (so *ScaledObject) GetHPAMinReplicas() *int32 {
 	if so.Spec.MinReplicaCount != nil && *so.Spec.MinReplicaCount > 0 {
 		return so.Spec.MinReplicaCount
@@ -246,7 +257,7 @@ func (so *ScaledObject) GetHPAMinReplicas() *int32 {
 	return &tmp
 }
 
-// getHPAMaxReplicas returns MaxReplicas based on definition in ScaledObject or default value if not defined
+// GetHPAMaxReplicas returns MaxReplicas based on definition in ScaledObject or default value if not defined
 func (so *ScaledObject) GetHPAMaxReplicas() int32 {
 	if so.Spec.MaxReplicaCount != nil {
 		return *so.Spec.MaxReplicaCount
@@ -254,7 +265,7 @@ func (so *ScaledObject) GetHPAMaxReplicas() int32 {
 	return defaultHPAMaxReplicas
 }
 
-// checkReplicaCountBoundsAreValid checks that Idle/Min/Max ReplicaCount defined in ScaledObject are correctly specified
+// CheckReplicaCountBoundsAreValid checks that Idle/Min/Max ReplicaCount defined in ScaledObject are correctly specified
 // i.e. that Min is not greater than Max or Idle greater or equal to Min
 func CheckReplicaCountBoundsAreValid(scaledObject *ScaledObject) error {
 	min := int32(0)
@@ -288,10 +299,11 @@ func CheckFallbackValid(scaledObject *ScaledObject) error {
 
 	for _, trigger := range scaledObject.Spec.Triggers {
 		if trigger.Type == cpuString || trigger.Type == memoryString {
-			return fmt.Errorf("type is %s , but fallback it is not supported by the CPU & memory scalers", trigger.Type)
+			scaledobjecttypeslog.Error(nil, fmt.Sprintf("type is %s , but fallback it is not supported by the CPU & memory scalers", trigger.Type))
+			EventEmitter.Emit(scaledObject, scaledObject.Namespace, corev1.EventTypeWarning, eventingv1alpha1.ScaledObjectFailedType, eventreason.ScaledObjectCheckFailed, message.ScaledObjectMayNotBehaveAsExpectationMsg)
 		}
 		if trigger.MetricType != autoscalingv2.AverageValueMetricType {
-			return fmt.Errorf("MetricType=%s, but Fallback can only be enabled for triggers with metric of type AverageValue", trigger.MetricType)
+			return fmt.Errorf("MetricType=%s, but fallback can only be enabled for triggers with metric of type AverageValue", trigger.MetricType)
 		}
 	}
 	return nil
diff --git a/apis/keda/v1alpha1/scaledobject_webhook.go b/apis/keda/v1alpha1/scaledobject_webhook.go
index 41bd0355596..4b7e0cb60e3 100644
--- a/apis/keda/v1alpha1/scaledobject_webhook.go
+++ b/apis/keda/v1alpha1/scaledobject_webhook.go
@@ -193,7 +193,7 @@ func verifyFallback(incomingSo *ScaledObject, action string, _ bool) error {
 		scaledobjectlog.WithValues("name", incomingSo.Name).Error(err, "validation error")
 		metricscollector.RecordScaledObjectValidatingErrors(incomingSo.Namespace, action, "incorrect-fallback")
 	}
-	return nil
+	return err
 }
 
 func verifyTriggers(incomingObject interface{}, action string, _ bool) error {
diff --git a/apis/keda/v1alpha1/scaledobject_webhook_test.go b/apis/keda/v1alpha1/scaledobject_webhook_test.go
index e30404d16c4..08970b121ac 100644
--- a/apis/keda/v1alpha1/scaledobject_webhook_test.go
+++ b/apis/keda/v1alpha1/scaledobject_webhook_test.go
@@ -176,7 +176,7 @@ var _ = It("shouldn't validate the so creation when the fallback is wrong", func
 	}).Should(HaveOccurred())
 })
 
-var _ = It("shouldn't validate the so creation When the fallback are configured and the scaler is either CPU or memory.", func() {
+var _ = It("should validate the so creation When the fallback are configured and the scaler is either CPU or memory.", func() {
 	namespaceName := "wrong-fallback-cpu-memory"
 	namespace := createNamespace(namespaceName)
 	workload := createDeployment(namespaceName, true, true)
@@ -193,7 +193,7 @@ var _ = It("shouldn't validate the so creation When the fallback are configured
 
 	Eventually(func() error {
 		return k8sClient.Create(context.Background(), so)
-	}).Should(HaveOccurred())
+	}).ShouldNot(HaveOccurred())
 })
 
 var _ = It("shouldn't validate the so creation when there is another unmanaged hpa and so has transfer-hpa-ownership activated", func() {
diff --git a/pkg/common/message/message.go b/pkg/common/message/message.go
index 4abcc0402ff..388e032d75e 100644
--- a/pkg/common/message/message.go
+++ b/pkg/common/message/message.go
@@ -42,4 +42,6 @@ const (
 	ClusterTriggerAuthenticationCreatedMsg = "New ClusterTriggerAuthentication configured"
 
 	ClusterTriggerAuthenticationUpdatedMsg = "ClusterTriggerAuthentication %s is updated"
+
+	ScaledObjectMayNotBehaveAsExpectationMsg = "ScaledObject may not behave as expectation"
 )