diff --git a/demoiselle-rest/src/main/java/org/demoiselle/jee/rest/exception/treatment/ExceptionTreatmentImpl.java b/demoiselle-rest/src/main/java/org/demoiselle/jee/rest/exception/treatment/ExceptionTreatmentImpl.java
index a1d91f751..230fcb070 100644
--- a/demoiselle-rest/src/main/java/org/demoiselle/jee/rest/exception/treatment/ExceptionTreatmentImpl.java
+++ b/demoiselle-rest/src/main/java/org/demoiselle/jee/rest/exception/treatment/ExceptionTreatmentImpl.java
@@ -8,6 +8,8 @@
 
 import java.sql.SQLException;
 import java.util.ArrayList;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -26,8 +28,6 @@
 import org.demoiselle.jee.rest.message.DemoiselleRESTMessage;
 
 import com.fasterxml.jackson.databind.exc.InvalidFormatException;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
 
 /**
  * Default implementation of All Exception Treatments in Demoiselle Framework.
@@ -87,7 +87,13 @@ public Response getFormatedError(Throwable exception, HttpServletRequest request
             ConstraintViolationException c = (ConstraintViolationException) exception;
 
             c.getConstraintViolations().stream().forEach((violation) -> {
-                String objectType = violation.getLeafBean().getClass().getSimpleName();
+                Object bean = violation.getLeafBean();
+                String objectType = bean.getClass().getSimpleName();
+                boolean isProxy = objectType.contains("$Proxy$");
+                // if it's a wrapped proxy object, get the original bean class that is the superclass
+                if(isProxy) {
+                   objectType = bean.getClass().getSuperclass().getSimpleName();
+                }
 
                 // This is fixed because REST beans validations only accept ONE
                 // parameter