diff --git a/apps/account/serializers/user.py b/apps/account/serializers/user.py
index b86eba4..df34944 100644
--- a/apps/account/serializers/user.py
+++ b/apps/account/serializers/user.py
@@ -42,7 +42,7 @@ class UserProfileSerializer(serializers.ModelSerializer):
 
 class UserRegisterSerializer(serializers.ModelSerializer):
     fcm = serializers.CharField(required=False, allow_blank=True, allow_null=True)
-    device_id = serializers.CharField(required=False, allow_blank=True, allow_null=True)
+    device_id = serializers.CharField(required=False, allow_blank=True, allow_null=True, write_only=True)
     email = serializers.EmailField()
       
     class Meta:
@@ -52,11 +52,20 @@ class UserRegisterSerializer(serializers.ModelSerializer):
             'fullname': {'required': True,},
             'email': {'required': True,},
         }
+    
+    def create(self, validated_data):
+        device_id = validated_data.pop('device_id', None)
+        user = super().create(validated_data)
+        if device_id:
+            user.device_id = device_id
+            user.save()
+        return user
 
     def validate_email(self, value):
-        if User.objects.filter(email=value).exists():
+        normalized_email = User.objects.normalize_email(value)
+        if User.objects.filter(email=normalized_email).exists():
             raise serializers.ValidationError("This email is already registered.")
-        return value
+        return normalized_email
 
     
 
@@ -65,7 +74,12 @@ class UserVerifySerializer(serializers.Serializer):
     email = serializers.EmailField()
     device_id = serializers.CharField(max_length=255, required=False)
     
-
+    def validate_email(self, value):
+        """
+        Normalize the email to ensure the Redis key matches correctly.
+        """
+        return User.objects.normalize_email(value)
+    
 
 class UserLoginSerializer(serializers.Serializer):
     password = serializers.CharField(write_only=True)
@@ -83,6 +97,12 @@ class UserLoginSerializer(serializers.Serializer):
         # data.pop('fcm', None)        
         # data.pop('device_id', None)        
         return data
+    def validate_email(self, value):
+        """
+        Normalize email for case-insensitive login.
+        """
+        return User.objects.normalize_email(value)
+
 
 # class UserLoginSerializer(serializers.Serializer):
 #     password = serializers.CharField(write_only=True)
@@ -98,17 +118,29 @@ class UserLoginSerializer(serializers.Serializer):
 
         
         
-class UserRecoverPasswordSerializer(serializers.ModelSerializer):
-    email = serializers.EmailField()
+# class UserRecoverPasswordSerializer(serializers.ModelSerializer):
+#     email = serializers.EmailField()
     
-    class Meta:
-        model = User
-        fields = ['email',]
-        extra_kwargs = {
-            'email': {'required': True,},
-        }
-
+#     class Meta:
+#         model = User
+#         fields = ['email',]
+#         extra_kwargs = {
+#             'email': {'required': True,},
+#         }
+
+class UserRecoverPasswordSerializer(serializers.Serializer):
+    """
+    Validates that an email is provided and is in a valid format
+    without checking for database uniqueness.
+    """
+    email = serializers.EmailField(required=True)
 
+    def validate_email(self, value):
+        """
+        Normalize the email address to ensure case-insensitive lookups.
+        """
+        return User.objects.normalize_email(value)
+    
 class UserResetPasswordSerializer(serializers.ModelSerializer):
     password = serializers.CharField(write_only=True)