diff --git a/frontend/modules/commercial/components/ClientAddressBlock.vue b/frontend/modules/commercial/components/ClientAddressBlock.vue
index efc9240..ee6e08b 100644
--- a/frontend/modules/commercial/components/ClientAddressBlock.vue
+++ b/frontend/modules/commercial/components/ClientAddressBlock.vue
@@ -54,6 +54,7 @@
             :options="countryOptions"
             :label="t('commercial.clients.form.address.country')"
             :readonly="readonly"
+            :required="true"
             @update:model-value="(v: string | number | null) => update('country', String(v ?? 'France'))"
         />
 
@@ -62,6 +63,7 @@
             :label="t('commercial.clients.form.address.postalCode')"
             :mask="POSTAL_CODE_MASK"
             :readonly="readonly"
+            :required="true"
             :error="errors?.postalCode"
             @update:model-value="onPostalCodeChange"
         />
@@ -75,6 +77,7 @@
             :label="t('commercial.clients.form.address.city')"
             :readonly="readonly"
             empty-option-label=""
+            :required="true"
             :error="errors?.city"
             @update:model-value="(v: string | number | null) => update('city', v === null ? null : String(v))"
         />
@@ -83,6 +86,7 @@
             :model-value="model.city"
             :label="t('commercial.clients.form.address.city')"
             :readonly="readonly"
+            :required="true"
             :error="errors?.city"
             @update:model-value="(v: string) => update('city', v)"
         />
@@ -103,6 +107,7 @@
                 :min-search-length="3"
                 :label="t('commercial.clients.form.address.street')"
                 :readonly="readonly"
+                :required="true"
                 :error="errors?.street"
                 @update:model-value="(v: string | number | null) => update('street', v === null ? null : String(v))"
                 @search="onAddressSearch"
@@ -113,6 +118,7 @@
                 :model-value="model.street"
                 :label="t('commercial.clients.form.address.street')"
                 :readonly="readonly"
+                :required="true"
                 :error="errors?.street"
                 @update:model-value="(v: string) => update('street', v)"
             />
diff --git a/frontend/modules/commercial/pages/clients/[id]/edit.vue b/frontend/modules/commercial/pages/clients/[id]/edit.vue
index d60bc04..b6b1297 100644
--- a/frontend/modules/commercial/pages/clients/[id]/edit.vue
+++ b/frontend/modules/commercial/pages/clients/[id]/edit.vue
@@ -228,12 +228,14 @@
                                     :label="t('commercial.clients.form.accounting.siren')"
                                     :mask="SIREN_MASK"
                                     :readonly="accountingReadonly"
+                                    :required="true"
                                     :error="accountingErrors.errors.siren"
                                 />
                                 <MalioInputText
                                     v-model="accounting.accountNumber"
                                     :label="t('commercial.clients.form.accounting.accountNumber')"
                                     :readonly="accountingReadonly"
+                                    :required="true"
                                     :error="accountingErrors.errors.accountNumber"
                                 />
                                 <MalioSelect
@@ -242,6 +244,7 @@
                                     :label="t('commercial.clients.form.accounting.tvaMode')"
                                     :readonly="accountingReadonly"
                                     empty-option-label=""
+                                    :required="true"
                                     :error="accountingErrors.errors.tvaMode"
                                     @update:model-value="(v: string | number | null) => accounting.tvaModeIri = v === null ? null : String(v)"
                                 />
@@ -249,6 +252,7 @@
                                     v-model="accounting.nTva"
                                     :label="t('commercial.clients.form.accounting.nTva')"
                                     :readonly="accountingReadonly"
+                                    :required="true"
                                     :error="accountingErrors.errors.nTva"
                                 />
                                 <MalioSelect
@@ -257,6 +261,7 @@
                                     :label="t('commercial.clients.form.accounting.paymentDelay')"
                                     :readonly="accountingReadonly"
                                     empty-option-label=""
+                                    :required="true"
                                     :error="accountingErrors.errors.paymentDelay"
                                     @update:model-value="(v: string | number | null) => accounting.paymentDelayIri = v === null ? null : String(v)"
                                 />
@@ -266,6 +271,7 @@
                                     :label="t('commercial.clients.form.accounting.paymentType')"
                                     :readonly="accountingReadonly"
                                     empty-option-label=""
+                                    :required="true"
                                     :error="accountingErrors.errors.paymentType"
                                     @update:model-value="onPaymentTypeChange"
                                 />
diff --git a/frontend/modules/commercial/pages/clients/new.vue b/frontend/modules/commercial/pages/clients/new.vue
index 751bb26..06d7479 100644
--- a/frontend/modules/commercial/pages/clients/new.vue
+++ b/frontend/modules/commercial/pages/clients/new.vue
@@ -226,12 +226,14 @@
                                 :label="t('commercial.clients.form.accounting.siren')"
                                 :mask="SIREN_MASK"
                                 :readonly="accountingReadonly"
+                                :required="true"
                                 :error="accountingErrors.errors.siren"
                             />
                             <MalioInputText
                                 v-model="accounting.accountNumber"
                                 :label="t('commercial.clients.form.accounting.accountNumber')"
                                 :readonly="accountingReadonly"
+                                :required="true"
                                 :error="accountingErrors.errors.accountNumber"
                             />
                             <MalioSelect
@@ -240,6 +242,7 @@
                                 :label="t('commercial.clients.form.accounting.tvaMode')"
                                 :readonly="accountingReadonly"
                                 empty-option-label=""
+                                :required="true"
                                 :error="accountingErrors.errors.tvaMode"
                                 @update:model-value="(v: string | number | null) => accounting.tvaModeIri = v === null ? null : String(v)"
                             />
@@ -247,6 +250,7 @@
                                 v-model="accounting.nTva"
                                 :label="t('commercial.clients.form.accounting.nTva')"
                                 :readonly="accountingReadonly"
+                                :required="true"
                                 :error="accountingErrors.errors.nTva"
                             />
                             <MalioSelect
@@ -255,6 +259,7 @@
                                 :label="t('commercial.clients.form.accounting.paymentDelay')"
                                 :readonly="accountingReadonly"
                                 empty-option-label=""
+                                :required="true"
                                 :error="accountingErrors.errors.paymentDelay"
                                 @update:model-value="(v: string | number | null) => accounting.paymentDelayIri = v === null ? null : String(v)"
                             />
@@ -264,6 +269,7 @@
                                 :label="t('commercial.clients.form.accounting.paymentType')"
                                 :readonly="accountingReadonly"
                                 empty-option-label=""
+                                :required="true"
                                 :error="accountingErrors.errors.paymentType"
                                 @update:model-value="onPaymentTypeChange"
                             />