diff --git a/apps/admin/src/features/events/events-page.tsx b/apps/admin/src/features/events/events-page.tsx
index a3a9f21..09b6485 100644
--- a/apps/admin/src/features/events/events-page.tsx
+++ b/apps/admin/src/features/events/events-page.tsx
@@ -723,6 +723,7 @@ function EventDetail({ eventId, onCancelled }: { eventId: string; onCancelled: (
               >
                 <Icons.Send size={13} /> Post update <span className="kbdhint">⌘⏎</span>
               </button>
+              <div className="evt-post-hint">Updates are posted as CivFix, not from your own account.</div>
             </div>
           </div>
         </div>
diff --git a/apps/admin/src/features/reports/official-author.test.ts b/apps/admin/src/features/reports/official-author.test.ts
new file mode 100644
index 0000000..f61835f
--- /dev/null
+++ b/apps/admin/src/features/reports/official-author.test.ts
@@ -0,0 +1,12 @@
+import { readFileSync } from "node:fs"
+
+import { describe, expect, it } from "vitest"
+
+const source = readFileSync(new URL("./reports-page.tsx", import.meta.url), "utf8")
+
+describe("official author in the report chat", () => {
+  it("marks CivFix posts by the server's official flag, never by name or handle", () => {
+    expect(source).toMatch(/msg\.from\?\.official && !removed/)
+    expect(source).not.toMatch(/handle\s*===|name\s*===\s*"CivFix"/)
+  })
+})
diff --git a/apps/admin/src/features/reports/reports-page.tsx b/apps/admin/src/features/reports/reports-page.tsx
index 97bd27f..d4b77a9 100644
--- a/apps/admin/src/features/reports/reports-page.tsx
+++ b/apps/admin/src/features/reports/reports-page.tsx
@@ -251,6 +251,11 @@ function ChatMessageRow({
             <span className="dsc-msg-who">{authorName}</span>
           )}
           {handle && !removed && <span className="dsc-msg-handle mono">{handle}</span>}
+          {msg.from?.official && !removed && (
+            <span className="pill status-ok tight" title="The official CivFix account">
+              <Icons.Check size={10} /> Official
+            </span>
+          )}
           {msg.forwardedToCity && (
             <span className="pill status-progress tight" title="Forwarded to the routed city">
               <Icons.Send size={10} /> Forwarded to city
@@ -437,7 +442,7 @@ function ReportDiscussion({
           className="rep-followup"
           rows={3}
           maxLength={MESSAGE_BODY_MAX}
-          placeholder="Message the neighbors in this report's chat…"
+          placeholder="Message the neighbors as CivFix…"
           value={draft}
           onChange={(e) => setDraft(e.target.value)}
           onKeyDown={(e) => {
diff --git a/apps/admin/src/styles/admin.css b/apps/admin/src/styles/admin.css
index 1fd910e..390f715 100644
--- a/apps/admin/src/styles/admin.css
+++ b/apps/admin/src/styles/admin.css
@@ -2508,6 +2508,7 @@ img.user-av { object-fit: cover; background: var(--paper-2); }
 .evt-msg-who { font-weight: 700; font-size: 12px; color: var(--sun-700); }
 .evt-msg-when { font-family: var(--font-mono); font-size: 10px; color: var(--ink-4); }
 .evt-msg-text { grid-column: 1 / -1; font-size: 12.5px; color: var(--ink); line-height: 1.4; }
+.evt-post-hint { font-size: 11px; color: var(--ink-3); margin-top: 6px; }
 
 /* -- Report discussion (public comment thread; distinct from the Activity timeline) -- */
 .dsc-list { display: flex; flex-direction: column; gap: 10px; }