diff --git a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ConsistentDateParameterValidator.java b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ConsistentDateParameterValidator.java
index 0ee1b6eda1..f1c97760d7 100644
--- a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ConsistentDateParameterValidator.java
+++ b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ConsistentDateParameterValidator.java
@@ -9,15 +9,11 @@ import java.time.LocalDate;
 @SupportedValidationTarget(ValidationTarget.PARAMETERS)
 public class ConsistentDateParameterValidator implements ConstraintValidator<ConsistentDateParameters, Object[]> {
 
-    @Override
-    public void initialize(ConsistentDateParameters constraintAnnotation) {
-    }
-
     @Override
     public boolean isValid(Object[] value, ConstraintValidatorContext context) {
 
         if (value[0] == null || value[1] == null) {
-            return false;
+            return true;
         }
 
         if (!(value[0] instanceof LocalDate) || !(value[1] instanceof LocalDate)) {
diff --git a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ValidReservationValidator.java b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ValidReservationValidator.java
index fc225999be..7b730480ed 100644
--- a/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ValidReservationValidator.java
+++ b/javaxval/src/main/java/org/baeldung/javaxval/methodvalidation/constraints/ValidReservationValidator.java
@@ -8,15 +8,11 @@ import java.time.LocalDate;
 
 public class ValidReservationValidator implements ConstraintValidator<ValidReservation, Reservation> {
 
-    @Override
-    public void initialize(ValidReservation constraintAnnotation) {
-    }
-
     @Override
     public boolean isValid(Reservation reservation, ConstraintValidatorContext context) {
 
         if (reservation == null) {
-            return false;
+            return true;
         }
 
         if (!(reservation instanceof Reservation)) {