diff --git a/Front-End/src/components/Inscription/ResponsableInputFields.js b/Front-End/src/components/Inscription/ResponsableInputFields.js
index 231cce7..2723aaa 100644
--- a/Front-End/src/components/Inscription/ResponsableInputFields.js
+++ b/Front-End/src/components/Inscription/ResponsableInputFields.js
@@ -34,6 +34,7 @@ export default function ResponsableInputFields({
 
   const getLocalError = (index, field) => {
     const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+    const dateRegex = /^\d{4}-\d{2}-\d{2}$/;
     if (
       // Student Form
       (field === 'last_name' &&
@@ -48,7 +49,8 @@ export default function ResponsableInputFields({
           !emailRegex.test(guardians[index].associated_profile_email))) ||
       (field === 'birth_date' &&
         (!guardians[index].birth_date ||
-          guardians[index].birth_date.trim() === '')) ||
+          guardians[index].birth_date.trim() === '' ||
+          !dateRegex.test(guardians[index].birth_date))) ||
       (field === 'profession' &&
         (!guardians[index].profession ||
           guardians[index].profession.trim() === '')) ||
@@ -136,7 +138,7 @@ export default function ResponsableInputFields({
               name="nomResponsable"
               type="text"
               label={t('lastname')}
-              value={item.last_name}
+              value={item.last_name || ''}
               onChange={(event) => {
                 onGuardiansChange(item.id, 'last_name', event.target.value);
               }}
@@ -148,7 +150,7 @@ export default function ResponsableInputFields({
               name="prenomResponsable"
               type="text"
               label={t('firstname')}
-              value={item.first_name}
+              value={item.firstname || ''}
               onChange={(event) => {
                 onGuardiansChange(item.id, 'first_name', event.target.value);
               }}
@@ -163,7 +165,7 @@ export default function ResponsableInputFields({
               name="mailResponsable"
               type="email"
               label={t('email')}
-              value={item.associated_profile_email}
+              value={item.associated_profile_email || ''}
               onChange={(event) => {
                 onGuardiansChange(
                   item.id,
@@ -178,7 +180,7 @@ export default function ResponsableInputFields({
             <InputPhone
               name="telephoneResponsable"
               label="phone"
-              value={item.phone}
+              value={item.phone || ''}
               onChange={(event) => {
                 onGuardiansChange(item.id, 'phone', event.target.value);
               }}
@@ -193,7 +195,7 @@ export default function ResponsableInputFields({
               name="dateNaissanceResponsable"
               type="date"
               label={t('birthdate')}
-              value={item.birth_date}
+              value={item.birth_date || ''}
               onChange={(event) => {
                 onGuardiansChange(item.id, 'birth_date', event.target.value);
               }}
@@ -205,7 +207,7 @@ export default function ResponsableInputFields({
               name="professionResponsable"
               type="text"
               label={t('profession')}
-              value={item.profession}
+              value={item.profession || ''}
               onChange={(event) => {
                 onGuardiansChange(item.id, 'profession', event.target.value);
               }}
@@ -220,7 +222,7 @@ export default function ResponsableInputFields({
               name="adresseResponsable"
               type="text"
               label={t('address')}
-              value={item.address}
+              value={item.address || ''}
               onChange={(event) => {
                 onGuardiansChange(item.id, 'address', event.target.value);
               }}
diff --git a/Front-End/src/components/Inscription/SiblingInputFields.js b/Front-End/src/components/Inscription/SiblingInputFields.js
index 12d9d47..21512f9 100644
--- a/Front-End/src/components/Inscription/SiblingInputFields.js
+++ b/Front-End/src/components/Inscription/SiblingInputFields.js
@@ -17,6 +17,7 @@ export default function SiblingInputFields({
   };
 
   const getLocalError = (index, field) => {
+    const dateRegex = /^\d{4}-\d{2}-\d{2}$/;
     if (
       (field === 'last_name' &&
         (!siblings[index].last_name ||
@@ -26,7 +27,8 @@ export default function SiblingInputFields({
           siblings[index].first_name.trim() === '')) ||
       (field === 'birth_date' &&
         (!siblings[index].birth_date ||
-          siblings[index].birth_date.trim() === ''))
+          siblings[index].birth_date.trim() === '' ||
+          !dateRegex.test(siblings[index].birth_date)))
     ) {
       return 'Champs requis';
     }
diff --git a/Front-End/src/components/Inscription/StudentInfoForm.js b/Front-End/src/components/Inscription/StudentInfoForm.js
index 46d7672..ac3e256 100644
--- a/Front-End/src/components/Inscription/StudentInfoForm.js
+++ b/Front-End/src/components/Inscription/StudentInfoForm.js
@@ -109,6 +109,7 @@ export default function StudentInfoForm({
   };
 
   const getLocalError = (field) => {
+    const dateRegex = /^\d{4}-\d{2}-\d{2}$/;
     if (
       // Student Form
       (field === 'last_name' &&
@@ -120,7 +121,9 @@ export default function StudentInfoForm({
       (field === 'nationality' &&
         (!formData.nationality || formData.nationality.trim() === '')) ||
       (field === 'birth_date' &&
-        (!formData.birth_date || formData.birth_date.trim() === '')) ||
+        (!formData.birth_date ||
+          formData.birth_date.trim() === '' ||
+          !dateRegex.test(formData.birth_date))) ||
       (field === 'birth_place' &&
         (!formData.birth_place || formData.birth_place.trim() === '')) ||
       (field === 'birth_postal_code' &&