diff --git a/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidPaymentMethodException.java b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidPaymentMethodException.java
new file mode 100644
index 0000000..7304eb9
--- /dev/null
+++ b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidPaymentMethodException.java
@@ -0,0 +1,8 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.subscription.exception;
+
+public class NotValidPaymentMethodException extends RuntimeException {
+
+    public NotValidPaymentMethodException(String message) {
+        super(message);
+    }
+}
diff --git a/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidSubscriptionException.java b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidSubscriptionException.java
new file mode 100644
index 0000000..27829f6
--- /dev/null
+++ b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/exception/NotValidSubscriptionException.java
@@ -0,0 +1,8 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.subscription.exception;
+
+public class NotValidSubscriptionException extends RuntimeException {
+
+    public NotValidSubscriptionException(String message) {
+        super(message);
+    }
+}
diff --git a/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/PaymentMethodValidator.java b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/PaymentMethodValidator.java
new file mode 100644
index 0000000..a9c9590
--- /dev/null
+++ b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/PaymentMethodValidator.java
@@ -0,0 +1,27 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.subscription.validator;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.subscription.PaymentMethodInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.subscription.exception.NotValidPaymentMethodException;
+
+import java.util.Set;
+
+public class PaymentMethodValidator {
+
+    public static final String MODE_PAIEMENT_IS_NOT_VALID = "paymentType is not valid";
+
+    private PaymentMethodValidator() {
+
+    }
+
+    public static void validate(PaymentMethodInfo newPaymentMethod)
+            throws NotValidPaymentMethodException {
+        validatePaymentType(newPaymentMethod);
+    }
+
+    private static void validatePaymentType(PaymentMethodInfo newPaymentMethod)
+            throws NotValidPaymentMethodException {
+        Set<String> Valid_Payment_Type = Set.of("CB", "PAYPAL");
+        if (!Valid_Payment_Type.contains(newPaymentMethod.paymentType())) {
+            throw new NotValidPaymentMethodException(MODE_PAIEMENT_IS_NOT_VALID);}
+    }
+}
diff --git a/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/SubscriptionValidator.java b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/SubscriptionValidator.java
new file mode 100644
index 0000000..7dd651f
--- /dev/null
+++ b/src/main/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/SubscriptionValidator.java
@@ -0,0 +1,36 @@
+package fr.iut_fbleau.but3.dev62.mylibrary.subscription.validator;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.subscription.SubscriptionInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.subscription.exception.NotValidSubscriptionException;
+
+import java.time.LocalDate;
+import java.util.Set;
+
+public class SubscriptionValidator {
+
+    public static final String SUBSCRIPTION_DURATION_DESIRED_IS_NOT_VALID = "subscriptionDurationDesired will be 3, 6 or 12 by the ENUM file SubscriptionDurationDesired";
+    public static final String DESIRED_START_DATE_CANNOT_BE_BEFORE_TODAY = "desiredStartDate cannot be before today";
+
+    private SubscriptionValidator() {
+
+    }
+
+    public static void validate(SubscriptionInfo newSubscription) throws NotValidSubscriptionException {
+        validateDesiredStartDate(newSubscription);
+        validateSubscriptionDurationDesired(newSubscription);
+    }
+
+    private static void validateSubscriptionDurationDesired(SubscriptionInfo newSubscription)
+            throws NotValidSubscriptionException {
+        Set<Integer> VALID_DURATIONS = Set.of(3, 6, 12);
+        if (!VALID_DURATIONS.contains(newSubscription.subscriptionDurationDesired())) {
+            throw new NotValidSubscriptionException(SUBSCRIPTION_DURATION_DESIRED_IS_NOT_VALID);}
+    }
+
+    private static void validateDesiredStartDate(SubscriptionInfo newSubscription)
+            throws NotValidSubscriptionException {
+        if (newSubscription.desiredStartDate().isBefore(LocalDate.now())) {
+            throw new NotValidSubscriptionException(DESIRED_START_DATE_CANNOT_BE_BEFORE_TODAY);
+        }
+    }
+}
diff --git a/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/PaymentMethodValidatorTest.java b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/PaymentMethodValidatorTest.java
index 8ed39e9..5dc10be 100644
--- a/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/PaymentMethodValidatorTest.java
+++ b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/PaymentMethodValidatorTest.java
@@ -2,6 +2,7 @@ package fr.iut_fbleau.but3.dev62.mylibrary.subscription.validator;
 
 import fr.iut_fbleau.but3.dev62.mylibrary.subscription.PaymentMethodInfo;
 import fr.iut_fbleau.but3.dev62.mylibrary.subscription.PaymentType;
+import fr.iut_fbleau.but3.dev62.mylibrary.subscription.exception.NotValidPaymentMethodException;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
@@ -44,7 +45,7 @@ public class PaymentMethodValidatorTest {
                     () -> PaymentMethodValidator.validate(invalidPaymentMethod)
             );
 
-            assertEquals(PaymentMethodValidator.MODE_PAIEMENT_IS_NOT_VALIDE, exception.getMessage());
+            assertEquals(PaymentMethodValidator.MODE_PAIEMENT_IS_NOT_VALID, exception.getMessage());
         }
     }
 }
diff --git a/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/SubscriptionValidatorTest.java b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/SubscriptionValidatorTest.java
index c9d3d64..f5e0c91 100644
--- a/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/SubscriptionValidatorTest.java
+++ b/src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/subscription/validator/SubscriptionValidatorTest.java
@@ -2,6 +2,7 @@ package fr.iut_fbleau.but3.dev62.mylibrary.subscription.validator;
 
 import fr.iut_fbleau.but3.dev62.mylibrary.subscription.SubscriptionDurationDesired;
 import fr.iut_fbleau.but3.dev62.mylibrary.subscription.SubscriptionInfo;
+import fr.iut_fbleau.but3.dev62.mylibrary.subscription.exception.NotValidSubscriptionException;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
@@ -50,7 +51,7 @@ public class SubscriptionValidatorTest {
                     NotValidSubscriptionException.class,
                     () -> SubscriptionValidator.validate(invalidSubscription)
             );
-            assertEquals(SubscriptionValidator.SUBSCRIPTION_DURATION_DESIRED_IS_NOT_VALIDE, exception.getMessage());
+            assertEquals(SubscriptionValidator.SUBSCRIPTION_DURATION_DESIRED_IS_NOT_VALID, exception.getMessage());
         }
     }