diff --git a/extension/src/shared/error-copy.ts b/extension/src/shared/error-copy.ts
index 2d62e92..04fa959 100644
--- a/extension/src/shared/error-copy.ts
+++ b/extension/src/shared/error-copy.ts
@@ -113,6 +113,28 @@ export const ERROR_COPY: Record<string, ErrorCopy> = {
     title: 'Unsupported vault type',
     body: 'This vault uses a second-factor type not supported by this version of Relicario — update the extension.',
   },
+  // --- Org vault (Plan A) ---
+  org_not_configured: {
+    title: 'Organization not set up',
+    body: 'This organization is not configured in this extension yet — add it before switching to it.',
+  },
+  not_an_org_member: {
+    title: 'Not a member',
+    body: 'This device is not a member of that organization. Ask an org admin to add this device key.',
+  },
+  device_key_unavailable: {
+    title: 'Device key unavailable',
+    body: 'Unlock your personal vault first so this device can open organization vaults.',
+    cta: UNLOCK_CTA,
+  },
+  not_in_org_context: {
+    title: 'No organization selected',
+    body: 'Switch to an organization before viewing its items.',
+  },
+  org_switch_failed: {
+    title: 'Could not open organization',
+    body: 'Something went wrong opening that organization — check your connection and try again.',
+  },
 };
 
 export function lookupErrorCopy(code: string): ErrorCopy {