diff --git a/packages/reva-admin-react/src/app/(admin)/certification-authority-structures/[certificationAuthorityStructureId]/certificateurs-administrateurs/create/createCertificationAuthority.hooks.ts b/packages/reva-admin-react/src/app/(admin)/certification-authority-structures/[certificationAuthorityStructureId]/certificateurs-administrateurs/create/createCertificationAuthority.hooks.ts
index 4130c34c0..f3716e4cd 100644
--- a/packages/reva-admin-react/src/app/(admin)/certification-authority-structures/[certificationAuthorityStructureId]/certificateurs-administrateurs/create/createCertificationAuthority.hooks.ts
+++ b/packages/reva-admin-react/src/app/(admin)/certification-authority-structures/[certificationAuthorityStructureId]/certificateurs-administrateurs/create/createCertificationAuthority.hooks.ts
@@ -27,7 +27,6 @@ const createCertificationAuthorityMutation = graphql(`
     $accountFirstname: String!
     $accountLastname: String!
     $certificationIds: [ID!]!
-    $departmentIds: [ID!]!
   ) {
     certification_authority_createCertificationAuthority(
       input: {
@@ -39,7 +38,6 @@ const createCertificationAuthorityMutation = graphql(`
         accountFirstname: $accountFirstname
         accountLastname: $accountLastname
         certificationIds: $certificationIds
-        departmentIds: $departmentIds
       }
     ) {
       id
@@ -82,7 +80,6 @@ export const useCreateCertificationAuthorityPage = () => {
         certificationAuthorityStructureId: certificationAuthorityStructureId,
         contactEmail: params.email,
         contactFullName: `${params.firstname} ${params.lastname}`,
-        departmentIds: [],
         certificationIds:
           certificationAuthorityStructure?.certifications?.map((c) => c.id) ||
           [],
diff --git a/packages/reva-api/modules/certification-authority/certification-authority.graphql b/packages/reva-api/modules/certification-authority/certification-authority.graphql
index 25e32ca9e..5b1e06e18 100644
--- a/packages/reva-api/modules/certification-authority/certification-authority.graphql
+++ b/packages/reva-api/modules/certification-authority/certification-authority.graphql
@@ -81,7 +81,6 @@ input CreateCertificationAuthorityInput {
   accountLastname: String!
   accountEmail: String!
   certificationAuthorityStructureId: ID!
-  departmentIds: [ID!]!
   certificationIds: [ID!]!
 }
 
diff --git a/packages/reva-api/modules/certification-authority/certification-authority.resolvers.ts b/packages/reva-api/modules/certification-authority/certification-authority.resolvers.ts
index be5850047..933c1e86d 100644
--- a/packages/reva-api/modules/certification-authority/certification-authority.resolvers.ts
+++ b/packages/reva-api/modules/certification-authority/certification-authority.resolvers.ts
@@ -174,7 +174,6 @@ const unsafeResolvers = {
           contactEmail: string;
           contactFullName: string;
           certificationAuthorityStructureId: string;
-          departmentIds: string[];
           certificationIds: string[];
         };
       },
diff --git a/packages/reva-api/modules/certification-authority/features/createCertificationAuthority.ts b/packages/reva-api/modules/certification-authority/features/createCertificationAuthority.ts
index 08c15ab1f..74b7973e7 100644
--- a/packages/reva-api/modules/certification-authority/features/createCertificationAuthority.ts
+++ b/packages/reva-api/modules/certification-authority/features/createCertificationAuthority.ts
@@ -9,7 +9,6 @@ export const createCertificationAuthority = async ({
   accountLastname,
   accountEmail,
   certificationAuthorityStructureId,
-  departmentIds,
   certificationIds,
 }: {
   label: string;
@@ -19,9 +18,12 @@ export const createCertificationAuthority = async ({
   accountLastname: string;
   accountEmail: string;
   certificationAuthorityStructureId: string;
-  departmentIds: string[];
   certificationIds: string[];
 }) => {
+  const allDepartements = await prismaClient.department.findMany({
+    select: { id: true },
+  });
+
   const newCertificationAuthority =
     await prismaClient.certificationAuthority.create({
       data: {
@@ -34,7 +36,9 @@ export const createCertificationAuthority = async ({
         },
         certificationAuthorityOnDepartment: {
           createMany: {
-            data: departmentIds.map((departmentId) => ({ departmentId })),
+            data: allDepartements.map((d) => ({
+              departmentId: d.id,
+            })),
           },
         },
         certificationAuthorityStructureId,