diff --git a/api/db/database-builder/factory/build-complementary-certification-subscription.js b/api/db/database-builder/factory/build-complementary-certification-subscription.js
index 28a1d634f0b..5ac5143516b 100644
--- a/api/db/database-builder/factory/build-complementary-certification-subscription.js
+++ b/api/db/database-builder/factory/build-complementary-certification-subscription.js
@@ -1,5 +1,6 @@
 import _ from 'lodash';
 
+import { SubscriptionTypes } from '../../../src/certification/shared/domain/models/SubscriptionTypes.js';
 import { databaseBuffer } from '../database-buffer.js';
 import { buildCertificationCandidate } from './build-certification-candidate.js';
 import { buildComplementaryCertification } from './build-complementary-certification.js';
@@ -16,14 +17,14 @@ const buildComplementaryCertificationSubscription = function ({
     ? buildComplementaryCertification().id
     : complementaryCertificationId;
 
-  const values = {
-    certificationCandidateId,
-    complementaryCertificationId,
-    createdAt,
-  };
   return databaseBuffer.pushInsertable({
     tableName: 'certification-subscriptions',
-    values,
+    values: {
+      certificationCandidateId,
+      complementaryCertificationId,
+      createdAt,
+      type: SubscriptionTypes.COMPLEMENTARY,
+    },
   });
 };
 
diff --git a/api/src/certification/session/infrastructure/repositories/certification-candidate-repository.js b/api/src/certification/session/infrastructure/repositories/certification-candidate-repository.js
index 277b7f9f298..c29cc842c95 100644
--- a/api/src/certification/session/infrastructure/repositories/certification-candidate-repository.js
+++ b/api/src/certification/session/infrastructure/repositories/certification-candidate-repository.js
@@ -14,6 +14,7 @@ import * as bookshelfToDomainConverter from '../../../../../lib/infrastructure/u
 import { logger } from '../../../../shared/infrastructure/utils/logger.js';
 import { normalize } from '../../../../shared/infrastructure/utils/string-utils.js';
 import { ComplementaryCertification } from '../../../complementary-certification/domain/models/ComplementaryCertification.js';
+import { SubscriptionTypes } from '../../../shared/domain/models/SubscriptionTypes.js';
 
 const linkToUser = async function ({ id, userId }) {
   try {
@@ -53,6 +54,7 @@ const saveInSession = async function ({
       const complementaryCertificationSubscriptionToSave = {
         complementaryCertificationId: certificationCandidate.complementaryCertification.id,
         certificationCandidateId: addedCertificationCandidate.id,
+        type: SubscriptionTypes.COMPLEMENTARY,
       };
 
       const insertComplementaryCertificationSubscriptionQuery = knex('certification-subscriptions').insert(
diff --git a/api/src/certification/shared/domain/models/SubscriptionTypes.js b/api/src/certification/shared/domain/models/SubscriptionTypes.js
new file mode 100644
index 00000000000..bbc8ce88296
--- /dev/null
+++ b/api/src/certification/shared/domain/models/SubscriptionTypes.js
@@ -0,0 +1,8 @@
+/**
+ * Types of certification subscriptions
+ * @readonly
+ * @enum {string}
+ */
+export const SubscriptionTypes = Object.freeze({
+  COMPLEMENTARY: 'COMPLEMENTARY',
+});