diff --git a/src/components/audit/AuditEntryInline.vue b/src/components/audit/AuditEntryInline.vue
index df4c0f8..3a77d5d 100644
--- a/src/components/audit/AuditEntryInline.vue
+++ b/src/components/audit/AuditEntryInline.vue
@@ -39,7 +39,7 @@
         <i18n-t :keypath="`audit.action.${event.action}.message`" scope="global" tag="p">
           <template #author>
             <RouterLink
-              v-if="$route.params.id !== event.author._id"
+              v-if="event.author && $route.params.id !== event.author._id"
               class="font-medium text-indigo-600 hover:underline"
               :to="{
                 name: ROUTE_NAMES.MEMBERS.DETAIL.INDEX,
@@ -47,7 +47,9 @@
               }">
               {{ event.author.name }}
             </RouterLink>
-            <span v-else class="font-medium text-gray-900">{{ event.author.name }}</span>
+            <span v-else class="font-medium text-gray-900">
+              {{ event.author?.name || $t('audit.author.unknown') }}
+            </span>
           </template>
         </i18n-t>
       </slot>
diff --git a/src/i18n/locales/en-GB/audit.json b/src/i18n/locales/en-GB/audit.json
index 8e6e94b..2e9615a 100644
--- a/src/i18n/locales/en-GB/audit.json
+++ b/src/i18n/locales/en-GB/audit.json
@@ -17,6 +17,9 @@
       "message": "{author} has unlocked the deck door"
     }
   },
+  "author": {
+    "unknown": "Someone"
+  },
   "list": {
     "description": "Everything that happens in detail.",
     "empty": {
diff --git a/src/i18n/locales/fr-FR/audit.json b/src/i18n/locales/fr-FR/audit.json
index 609c54e..49d8670 100644
--- a/src/i18n/locales/fr-FR/audit.json
+++ b/src/i18n/locales/fr-FR/audit.json
@@ -17,6 +17,9 @@
       "message": "{author} a déverrouillé la porte de la terrasse"
     }
   },
+  "author": {
+    "unknown": "Quelqu'un"
+  },
   "list": {
     "description": "Tout ce qui se passe en détail.",
     "empty": {
diff --git a/src/services/api/audit.ts b/src/services/api/audit.ts
index 0ae5fd8..4380aab 100644
--- a/src/services/api/audit.ts
+++ b/src/services/api/audit.ts
@@ -10,7 +10,7 @@ export enum AuditAction {
 
 export interface AuditEvent {
   _id: string;
-  author: {
+  author?: {
     _id?: string;
     wpUserId: number;
     name: string;
diff --git a/src/views/Private/History/HistoryEventsList.vue b/src/views/Private/History/HistoryEventsList.vue
index 0a7e19d..312df14 100644
--- a/src/views/Private/History/HistoryEventsList.vue
+++ b/src/views/Private/History/HistoryEventsList.vue
@@ -185,7 +185,8 @@ interface ListSorter {
 const ALL_LIST_SORTERS = computed<ListSorter[]>(() => [
   {
     key: 'occurred',
-    sort: (a, b) => new Date(b.occurred).getTime() - new Date(a.occurred).getTime(),
+    sort: (a: AuditEvent, b: AuditEvent) =>
+      new Date(b.occurred).getTime() - new Date(a.occurred).getTime(),
   },
   {
     key: 'action',
@@ -194,7 +195,9 @@ const ALL_LIST_SORTERS = computed<ListSorter[]>(() => [
   {
     key: 'author',
     sort: (a, b) =>
-      a.author.name.toLocaleLowerCase().localeCompare(b.author.name.toLocaleLowerCase()),
+      (a.author?.name.toLocaleLowerCase() || '').localeCompare(
+        b.author?.name.toLocaleLowerCase() || '',
+      ),
   },
 ]);