diff --git a/backend/users/jwt.py b/backend/users/jwt.py
index 4cb1bfc..795177a 100644
--- a/backend/users/jwt.py
+++ b/backend/users/jwt.py
@@ -2,3 +2,11 @@
 
 class CustomTokenObtainSerializer(TokenObtainPairSerializer):
     username_field = 'email'
+
+    def validate(self, attrs):
+        # Strip stray whitespace from copy-pasted emails (Issue #474).
+        # Password is intentionally left untouched.
+        if isinstance(attrs.get(self.username_field), str):
+            attrs[self.username_field] = attrs[self.username_field].strip()
+        return super().validate(attrs)
+    
\ No newline at end of file
diff --git a/backend/users/serializers.py b/backend/users/serializers.py
index 7ac9fbc..76f89a1 100644
--- a/backend/users/serializers.py
+++ b/backend/users/serializers.py
@@ -21,10 +21,17 @@ class RegisterSerializer(serializers.Serializer):
     last_name = serializers.CharField(required=False)
 
     def validate_email(self, value):
+        value = value.strip()
         if User.objects.filter(email__iexact=value).exists():
             raise serializers.ValidationError('A user with this email already exists.')
         return value
 
+    def validate_first_name(self, value):
+        return value.strip() if value else value
+
+    def validate_last_name(self, value):
+        return value.strip() if value else value
+
     def create(self, validated_data):
         org = Organization.objects.create(name=validated_data['organization_name'])
         user = User.objects.create_user(