diff --git a/functions/communityAdministration.js b/functions/communityAdministration.js
index 671e785..9d5e8fe 100644
--- a/functions/communityAdministration.js
+++ b/functions/communityAdministration.js
@@ -30,7 +30,7 @@ function parseAdminRequest(input) {
     const extra = ['admin_event_create', 'admin_event_edit'].includes(value.action) ? ['event'] : value.action === 'admin_event_capacity' ? ['capacity'] : [];
     parseStrictObject(value, { requiredKeys: ['action', 'accountUid', 'requestId', 'expectedRevision', 'reason', target, ...extra], optionalKeys: [] });
     check(typeof value.requestId === 'string' && UUID.test(value.requestId) && integer(value.expectedRevision) && identifier(value[target]) && value.reason === 'synthetic_staging_review', 'invalid-argument');
-    if (value.event) {
+    if (extra.includes('event')) {
       parseStrictObject(value.event, { requiredKeys: ['title', 'location', 'startAtMs', 'opensAtMs', 'closesAtMs', 'capacity'], optionalKeys: [] });
       check(text(value.event.title) && text(value.event.location)
         && [value.event.startAtMs, value.event.opensAtMs, value.event.closesAtMs].every((time) => integer(time, 8_640_000_000_000_000))
diff --git a/functions/communityAdministration.test.js b/functions/communityAdministration.test.js
index 10adb45..155d94c 100644
--- a/functions/communityAdministration.test.js
+++ b/functions/communityAdministration.test.js
@@ -35,6 +35,11 @@ test.each([
   { ...request('admin_event_create', { eventId: 'event', event: draft }), event: { ...draft, title: '\u202eInjected' } },
   { ...request('admin_event_capacity', { eventId: 'event', capacity: 1 }), capacity: 1.5 },
 ])('strict request rejects forged/financial/coerced/unsafe fields %#', (value) => { expect(() => parseAdminRequest(value)).toThrow(); });
+test.each([null, false, 0, 'event', []])('create/edit requires a typed event object %#', (event) => {
+  for (const action of ['admin_event_create', 'admin_event_edit']) {
+    expect(() => parseAdminRequest({ action, accountUid: 'officer', requestId: randomUUID(), expectedRevision: 0, reason: 'synthetic_staging_review', eventId: 'event', event })).toThrow();
+  }
+});
 test('synthetic approval is atomic/repeat-safe, supplies no payment or Auth claims', async () => {
   const command = approve(); await execute(command); await execute(command);
   expect((await members.status('runner')).membership).toMatchObject({ revision: 2, applicationStatus: 'approved', entitlement: 'current_member', accessThroughMs: term.endsAtMs });