diff --git a/src/ageAssurance/components/NoAccessScreen.tsx b/src/ageAssurance/components/NoAccessScreen.tsx
index 7db3dbf3f0..316758ed13 100644
--- a/src/ageAssurance/components/NoAccessScreen.tsx
+++ b/src/ageAssurance/components/NoAccessScreen.tsx
@@ -69,7 +69,7 @@ export function NoAccessScreen() {
     // just counting overall hits here
     logger.metric(`blockedGeoOverlay:shown`, {})
     logger.metric(`ageAssurance:noAccessScreen:shown`, {
-      accountCreatedAt: data?.accountCreatedAt,
+      accountCreatedAt: data?.accountCreatedAt || 'unknown',
       isAARegion,
       hasDeclaredAge,
       canUpdateBirthday,
diff --git a/src/logger/metrics.ts b/src/logger/metrics.ts
index 986b6f17c9..1f6c492da0 100644
--- a/src/logger/metrics.ts
+++ b/src/logger/metrics.ts
@@ -607,7 +607,7 @@ export type MetricEvents = {
   'ageAssurance:appealDialogOpen': {}
   'ageAssurance:appealDialogSubmit': {}
   'ageAssurance:noAccessScreen:shown': {
-    accountCreatedAt?: string
+    accountCreatedAt: string
     isAARegion: boolean
     hasDeclaredAge: boolean
     canUpdateBirthday: boolean