diff --git a/client/src/pages/dashboard/useDashboard.test.tsx b/client/src/pages/dashboard/useDashboard.test.tsx
index f3e2d44c8..01f9591b2 100644
--- a/client/src/pages/dashboard/useDashboard.test.tsx
+++ b/client/src/pages/dashboard/useDashboard.test.tsx
@@ -207,7 +207,7 @@ describe('useDashboard', () => {
   });
 
   it('FE-HOOK-DASH-014: a failing delete toasts and keeps the trip', async () => {
-    server.use(http.delete('/api/trips/:id', () => HttpResponse.json({ error: 'nope' }, { status: 500 })));
+    server.use(http.delete('/api/trips/:id', () => HttpResponse.json({}, { status: 500 })));
     const { result } = await mountLoaded();
 
     act(() => { result.current.setDeleteTrip(PARIS); });
@@ -230,7 +230,7 @@ describe('useDashboard', () => {
   });
 
   it('FE-HOOK-DASH-016: a failing archive only toasts', async () => {
-    server.use(http.put('/api/trips/:id', () => HttpResponse.json({ error: 'nope' }, { status: 500 })));
+    server.use(http.put('/api/trips/:id', () => HttpResponse.json({}, { status: 500 })));
     const { result } = await mountLoaded();
 
     await act(async () => { await result.current.handleArchive(101); });
@@ -238,6 +238,35 @@ describe('useDashboard', () => {
     expect(toastCalls).toContainEqual(['Failed to archive trip', 'error']);
   });
 
+  it('FE-HOOK-DASH-016b: an archive the server refuses says why (#2604)', async () => {
+    server.use(http.put('/api/trips/:id', () => HttpResponse.json({ error: 'No permission to archive/unarchive this trip' }, { status: 403 })));
+    const { result } = await mountLoaded();
+
+    await act(async () => { await result.current.handleArchive(101); });
+    await act(async () => { await result.current.handleUnarchive(103); });
+
+    expect(toastCalls.filter(c => c[1] === 'error')).toEqual([
+      ['No permission to archive/unarchive this trip', 'error'],
+      ['No permission to archive/unarchive this trip', 'error'],
+    ]);
+  });
+
+  it('FE-HOOK-DASH-016c: a delete or copy the server refuses says why (#2604)', async () => {
+    server.use(
+      http.delete('/api/trips/:id', () => HttpResponse.json({ error: 'No permission to delete this trip' }, { status: 403 })),
+      http.post('/api/trips/:id/copy', () => HttpResponse.json({ error: 'No permission to create trips' }, { status: 403 })),
+    );
+    const { result } = await mountLoaded();
+
+    act(() => { result.current.setDeleteTrip(PARIS); });
+    await act(async () => { await result.current.confirmDelete(); });
+    act(() => { result.current.setCopyTrip(PARIS); });
+    await act(async () => { await result.current.confirmCopy(); });
+
+    expect(toastCalls).toContainEqual(['No permission to delete this trip', 'error']);
+    expect(toastCalls).toContainEqual(['No permission to create trips', 'error']);
+  });
+
   it('FE-HOOK-DASH-017: restoring moves the trip back into the active list', async () => {
     server.use(http.put('/api/trips/:id', () => HttpResponse.json({ trip: { ...ROME, is_archived: 0 } })));
     const { result } = await mountLoaded();
@@ -252,7 +281,7 @@ describe('useDashboard', () => {
   });
 
   it('FE-HOOK-DASH-018: a failing restore only toasts', async () => {
-    server.use(http.put('/api/trips/:id', () => HttpResponse.json({ error: 'nope' }, { status: 500 })));
+    server.use(http.put('/api/trips/:id', () => HttpResponse.json({}, { status: 500 })));
     const { result } = await mountLoaded();
 
     await act(async () => { await result.current.handleUnarchive(103); });
@@ -284,7 +313,7 @@ describe('useDashboard', () => {
   });
 
   it('FE-HOOK-DASH-021: a failing copy only toasts', async () => {
-    server.use(http.post('/api/trips/:id/copy', () => HttpResponse.json({ error: 'nope' }, { status: 500 })));
+    server.use(http.post('/api/trips/:id/copy', () => HttpResponse.json({}, { status: 500 })));
     const { result } = await mountLoaded();
 
     act(() => { result.current.setCopyTrip(PARIS); });
diff --git a/client/src/pages/dashboard/useDashboard.ts b/client/src/pages/dashboard/useDashboard.ts
index b3fb8967e..9bc7f2acd 100644
--- a/client/src/pages/dashboard/useDashboard.ts
+++ b/client/src/pages/dashboard/useDashboard.ts
@@ -140,6 +140,8 @@ export function useDashboard() {
     }
   }
 
+  // A refusal says why (no right to archive or delete this trip, say) rather
+  // than only that it failed; the generic line stays for a failure without one.
   const confirmDelete = async () => {
     if (!deleteTrip) return
     try {
@@ -147,8 +149,8 @@ export function useDashboard() {
       setTrips(prev => prev.filter(t => t.id !== deleteTrip.id))
       setArchivedTrips(prev => prev.filter(t => t.id !== deleteTrip.id))
       toast.success(t('dashboard.toast.deleted'))
-    } catch {
-      toast.error(t('dashboard.toast.deleteError'))
+    } catch (err: unknown) {
+      toast.error(getApiErrorMessage(err, t('dashboard.toast.deleteError')))
     }
     setDeleteTrip(null)
   }
@@ -159,8 +161,8 @@ export function useDashboard() {
       setTrips(prev => prev.filter(t => t.id !== id))
       setArchivedTrips(prev => sortTrips([data.trip, ...prev]))
       toast.success(t('dashboard.toast.archived'))
-    } catch {
-      toast.error(t('dashboard.toast.archiveError'))
+    } catch (err: unknown) {
+      toast.error(getApiErrorMessage(err, t('dashboard.toast.archiveError')))
     }
   }
 
@@ -170,8 +172,8 @@ export function useDashboard() {
       setArchivedTrips(prev => prev.filter(t => t.id !== id))
       setTrips(prev => sortTrips([data.trip, ...prev]))
       toast.success(t('dashboard.toast.restored'))
-    } catch {
-      toast.error(t('dashboard.toast.restoreError'))
+    } catch (err: unknown) {
+      toast.error(getApiErrorMessage(err, t('dashboard.toast.restoreError')))
     }
   }
 
@@ -181,8 +183,8 @@ export function useDashboard() {
       const data = await tripsApi.copy(copyTrip.id, { title: `${copyTrip.title} (${t('dashboard.copySuffix')})` })
       setTrips(prev => sortTrips([data.trip, ...prev]))
       toast.success(t('dashboard.toast.copied'))
-    } catch {
-      toast.error(t('dashboard.toast.copyError'))
+    } catch (err: unknown) {
+      toast.error(getApiErrorMessage(err, t('dashboard.toast.copyError')))
     }
     setCopyTrip(null)
   }