diff --git a/frontend/src/__tests__/pages/ingest-csv.test.tsx b/frontend/src/__tests__/pages/ingest-csv.test.tsx
index 5d7ace88e..2df551d2a 100644
--- a/frontend/src/__tests__/pages/ingest-csv.test.tsx
+++ b/frontend/src/__tests__/pages/ingest-csv.test.tsx
@@ -15,11 +15,27 @@ const mocks = vi.hoisted(() => ({
   storeApiKey: vi.fn(),
 }));
 
+let ingestURLData: any = undefined;
+
 vi.mock('@/lib/auth-context', () => ({
   useAuth: () => ({ apiKey: 'cookie-managed', setApiKey: mocks.storeApiKey }), // pragma: allowlist secret
 }));
 vi.mock('@/hooks/use-api', () => ({
-  useIngestURL: () => ({ mutateAsync: mocks.ingestURL, reset: vi.fn(), isPending: false, isError: false }),
+  useIngestURL: () => ({
+    mutateAsync: async (args: any) => {
+      const data = await mocks.ingestURL(args);
+      ingestURLData = data;
+      return data;
+    },
+    reset: vi.fn(() => {
+      ingestURLData = undefined;
+    }),
+    get data() {
+      return ingestURLData;
+    },
+    isPending: false,
+    isError: false,
+  }),
   useIngestFile: () => ({ mutateAsync: mocks.ingestFile, reset: vi.fn(), isPending: false, isError: false }),
   useIngestEpcisEvent: () => ({ mutateAsync: mocks.ingestEpcisEvent, reset: vi.fn(), isPending: false }),
   useIngestEpcisBatch: () => ({ mutateAsync: mocks.ingestEpcisBatch, reset: vi.fn(), isPending: false }),
@@ -33,7 +49,12 @@ vi.mock('@/hooks/use-dashboard-refresh', () => ({
   notifyDashboardRefresh: mocks.refresh,
 }));
 vi.mock('@/app/ingest/NormalizedDocumentViewer', () => ({
-  NormalizedDocumentViewer: () => <div>Normalized document viewer</div>,
+  NormalizedDocumentViewer: ({ documentId }: { documentId?: string }) => (
+    <div>
+      <div>Normalized document viewer</div>
+      {documentId && <div>Receipt: {documentId}</div>}
+    </div>
+  ),
 }));
 
 async function uploadCsv() {
@@ -71,6 +92,7 @@ function csvResult(accepted: number, rejected: number) {
 describe('CSV import results on /ingest', () => {
   beforeEach(() => {
     vi.clearAllMocks();
+    ingestURLData = undefined;
     mocks.storeApiKey.mockResolvedValue(undefined);
   });
 
@@ -173,9 +195,96 @@ describe('CSV import results on /ingest', () => {
 
     expect(await screen.findByText('API key could not be saved. Please try again.')).toBeInTheDocument();
     expect(screen.getByText('Ingestion Failed')).toBeInTheDocument();
+    expect(document.querySelector('.workspace-load-error')).not.toBeNull();
     expect(mocks.ingestURL).not.toHaveBeenCalled();
   });
 
+  it('clears URL API-key save error when switching tabs and does not reappear on returning to URL tab', async () => {
+    mocks.storeApiKey.mockRejectedValue(new Error('API key could not be saved. Please try again.'));
+    render(<IngestPage />);
+    await userEvent.click(screen.getByRole('tab', { name: /url ingestion/i }));
+    fireEvent.change(screen.getByPlaceholderText('rge_...'), { target: { value: 'rge_replacement_key' } }); // pragma: allowlist secret
+    fireEvent.change(screen.getByPlaceholderText('https://example.com/regulatory-document.pdf'), {
+      target: { value: 'https://example.com/regulatory-document.pdf' },
+    });
+    await userEvent.click(screen.getByRole('button', { name: /ingest|upload & process/i }));
+
+    expect(await screen.findByText('API key could not be saved. Please try again.')).toBeInTheDocument();
+    expect(screen.getByText('Ingestion Failed')).toBeInTheDocument();
+    expect(document.querySelector('.workspace-load-error')).not.toBeNull();
+
+    await userEvent.click(screen.getByRole('tab', { name: /file upload/i }));
+
+    expect(screen.queryByText('API key could not be saved. Please try again.')).not.toBeInTheDocument();
+    expect(screen.queryByText('Ingestion Failed')).not.toBeInTheDocument();
+    expect(document.querySelector('.workspace-load-error')).toBeNull();
+
+    await userEvent.click(screen.getByRole('tab', { name: /url ingestion/i }));
+
+    expect(screen.queryByText('API key could not be saved. Please try again.')).not.toBeInTheDocument();
+    expect(screen.queryByText('Ingestion Failed')).not.toBeInTheDocument();
+    expect(document.querySelector('.workspace-load-error')).toBeNull();
+  });
+
+  it('keeps previous job progress visible when API key save fails on subsequent submit', async () => {
+    const jobId = crypto.randomUUID();
+    mocks.ingestURL.mockResolvedValue({ job_id: jobId, status: 'queued' });
+    mocks.getIngestionJob.mockResolvedValue({ status: 'queued' });
+    render(<IngestPage />);
+
+    await userEvent.click(screen.getByRole('tab', { name: /url ingestion/i }));
+    fireEvent.change(screen.getByPlaceholderText('https://example.com/regulatory-document.pdf'), {
+      target: { value: 'https://example.com/regulatory-document.pdf' },
+    });
+    await userEvent.click(screen.getByRole('button', { name: /ingest|upload & process/i }));
+
+    expect(await screen.findByText('Ingestion Progress')).toBeInTheDocument();
+    expect(screen.getByText(`Job ${jobId}`)).toBeInTheDocument();
+
+    mocks.storeApiKey.mockRejectedValue(new Error('API key could not be saved. Please try again.'));
+    fireEvent.change(screen.getByPlaceholderText('rge_...'), { target: { value: 'rge_replacement_key' } }); // pragma: allowlist secret
+    await userEvent.click(screen.getByRole('button', { name: /ingest|upload & process/i }));
+
+    expect(await screen.findByText('API key could not be saved. Please try again.')).toBeInTheDocument();
+    expect(screen.getByText('Ingestion Progress')).toBeInTheDocument();
+    expect(screen.getByText(`Job ${jobId}`)).toBeInTheDocument();
+  });
+
+  it('shows save error in completed view while retaining previous job receipt data on failed resubmit', async () => {
+    const jobId = crypto.randomUUID();
+    vi.useFakeTimers({ toFake: ['setInterval', 'clearInterval'] });
+    try {
+      mocks.ingestURL.mockResolvedValue({ job_id: jobId, status: 'queued' });
+      mocks.getIngestionJob.mockResolvedValue({ status: 'queued' });
+      render(<IngestPage />);
+
+      await userEvent.click(screen.getByRole('tab', { name: /url ingestion/i }));
+      fireEvent.change(screen.getByPlaceholderText('https://example.com/regulatory-document.pdf'), {
+        target: { value: 'https://example.com/regulatory-document.pdf' },
+      });
+      await userEvent.click(screen.getByRole('button', { name: /ingest|upload & process/i }));
+
+      expect(await screen.findByText('Ingestion Progress')).toBeInTheDocument();
+      expect(screen.getByText(`Job ${jobId}`)).toBeInTheDocument();
+
+      mocks.storeApiKey.mockRejectedValue(new Error('API key could not be saved. Please try again.'));
+      fireEvent.change(screen.getByPlaceholderText('rge_...'), { target: { value: 'rge_replacement_key' } }); // pragma: allowlist secret
+      await userEvent.click(screen.getByRole('button', { name: /ingest|upload & process/i }));
+
+      expect(await screen.findByText('API key could not be saved. Please try again.')).toBeInTheDocument();
+
+      mocks.getIngestionJob.mockResolvedValue({ status: 'completed' });
+      await vi.advanceTimersByTimeAsync(2000);
+
+      expect(await screen.findByText('API key could not be saved. Please try again.')).toBeInTheDocument();
+      expect(screen.getByRole('alert')).toHaveTextContent('API key could not be saved. Please try again.');
+      expect(screen.getByText('Normalized document viewer')).toBeInTheDocument();
+      expect(screen.getByText(`Receipt: ${jobId}`)).toBeInTheDocument();
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+
   it('offers the CTE Jev suggested and re-uploads with it only on confirmation', async () => {
     const rejected = Object.assign(new Error('No valid rows found: Row 2: No CTE type'), {
       response: {
diff --git a/frontend/src/app/ingest/page.tsx b/frontend/src/app/ingest/page.tsx
index 2f17618ba..25e4b520c 100644
--- a/frontend/src/app/ingest/page.tsx
+++ b/frontend/src/app/ingest/page.tsx
@@ -139,6 +139,11 @@ export default function IngestPage() {
     const tab = searchParams.get('tab');
     return tab === 'file' || tab === 'epcis' ? tab : 'url';
   });
+
+  const handleTabChange = (tab: string) => {
+    setActiveTab(tab);
+    setUrlError(null);
+  };
   const [file, setFile] = useState<File | null>(null);
   const [csvResult, setCsvResult] = useState<IngestCSVResponse | null>(null);
   const [csvError, setCsvError] = useState<string | null>(null);
@@ -188,6 +193,7 @@ export default function IngestPage() {
   const isPending = isSubmitting || ingestMutation.isPending || ingestFileMutation.isPending || epcisPending;
 
   const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    setUrlError(null);
     if (e.target.files && e.target.files[0]) {
       setFile(e.target.files[0]);
       setCsvResult(null);
@@ -198,6 +204,7 @@ export default function IngestPage() {
   };
 
   const handleEpcisFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    setUrlError(null);
     if (e.target.files && e.target.files[0]) {
       setEpcisFile(e.target.files[0]);
       setEpcisResult(null);
@@ -341,26 +348,12 @@ export default function IngestPage() {
   // browser proxy reads it from the cookie, then clear prior result state.
   // Returns false when the caller should stop without sending any request.
   const prepareSubmit = async (): Promise<boolean> => {
-    // Clear the previous upload's results and errors first, so a failed
-    // API-key save below never leaves stale error lines on screen.
-    setJobId(null);
-    setJobStatus('queued');
-    setStatusError(null);
-    setCsvResult(null);
+    // Clear previous save-error states first so stale save errors do not stack.
+    setUrlError(null);
     setCsvError(null);
-    setCteSuggestion(null);
-    setErrorColumnSuggestions([]);
-    setEpcisResult(null);
     setEpcisError(null);
     setEpcisErrorEvents([]);
-    setEpcisValidation(null);
-    setUrlError(null);
-    ingestMutation.reset();
-    ingestFileMutation.reset();
-    ingestEpcisEventMutation.reset();
-    ingestEpcisBatchMutation.reset();
-    ingestEpcisXmlMutation.reset();
-    validateEpcisMutation.reset();
+
     // Store the API key for future use
     if (!isAuthenticated && apiKey !== storedApiKey) {
       // The browser proxy reads the cookie written by setApiKey and ignores
@@ -376,6 +369,25 @@ export default function IngestPage() {
         return false;
       }
     }
+
+    // Once the API key is successfully saved, clear prior results, errors,
+    // and mutation states, and reset job tracking for the new upload.
+    // A failed API-key save keeps the previous job and receipt data intact.
+    setStatusError(null);
+    setCsvResult(null);
+    setCteSuggestion(null);
+    setErrorColumnSuggestions([]);
+    setEpcisResult(null);
+    setEpcisErrorEvents([]);
+    setEpcisValidation(null);
+    ingestMutation.reset();
+    ingestFileMutation.reset();
+    ingestEpcisEventMutation.reset();
+    ingestEpcisBatchMutation.reset();
+    ingestEpcisXmlMutation.reset();
+    validateEpcisMutation.reset();
+    setJobId(null);
+    setJobStatus('queued');
     return true;
   };
 
@@ -553,9 +565,10 @@ export default function IngestPage() {
       ? 'success'
       : 'warning'
     : 'neutral';
+  const activeSaveError = activeTab === 'file' ? csvError : activeTab === 'epcis' ? epcisError : urlError;
 
   return (
-    <PageContainer className={statusError || csvError || epcisError || ingestMutation.isError || jobStatus === 'failed' ? 'workspace-load-error' : undefined}>
+    <PageContainer className={statusError || urlError || csvError || epcisError || ingestMutation.isError || jobStatus === 'failed' ? 'workspace-load-error' : undefined}>
       <div className="mb-6">
         <WorkflowStepper currentStep="ingest" completedSteps={isAuthenticated || storedApiKey ? ['setup'] : []} />
       </div>
@@ -640,7 +653,7 @@ export default function IngestPage() {
                     <Button
                       type="button"
                       variant="secondary"
-                      onClick={() => setActiveTab('file')}
+                      onClick={() => handleTabChange('file')}
                       trailingIcon={<ArrowRight strokeWidth={1.75} aria-hidden="true" />}
                     >
                       Continue File Mapping
@@ -720,7 +733,7 @@ export default function IngestPage() {
                       )}
                     </div>}
 
-                    <Tabs value={activeTab} onValueChange={setActiveTab} className="w-full">
+                    <Tabs value={activeTab} onValueChange={handleTabChange} className="w-full">
                       <TabsList className="w-full">
                         <TabsTrigger value="url">URL Ingestion</TabsTrigger>
                         <TabsTrigger value="file">File Upload</TabsTrigger>
@@ -755,7 +768,7 @@ export default function IngestPage() {
                                 type="button"
                                 onClick={() => {
                                   setUrl(example.url);
-                                  setActiveTab('url');
+                                  handleTabChange('url');
                                 }}
                               >
                                 {example.label}
@@ -1052,8 +1065,14 @@ export default function IngestPage() {
                     </Button>
                   </div>
 
+                  {activeSaveError && (
+                    <Callout tone="danger" role="alert">
+                      {activeSaveError}
+                    </Callout>
+                  )}
+
                   <NormalizedDocumentViewer
-                    documentId={ingestMutation.data?.document_id || 'DEMO-DOC-ID'}
+                    documentId={ingestMutation.data?.document_id || ingestMutation.data?.doc_id || ingestMutation.data?.job_id || 'DEMO-DOC-ID'}
                   />
                 </CardContent>
               </Card>
diff --git a/frontend/src/lib/epcis-upload.ts b/frontend/src/lib/epcis-upload.ts
index 2de962658..cd9966081 100644
--- a/frontend/src/lib/epcis-upload.ts
+++ b/frontend/src/lib/epcis-upload.ts
@@ -91,11 +91,15 @@ export function normalizeEpcisIngestResult(data: EpcisIngestResponse | null | un
       ? record.rejected
       : Math.max(total - accepted, 0);
   const errorMessages: string[] = [];
+  const seenErrors = new Set<string>();
   if (Array.isArray(record.errors)) {
     for (const entry of record.errors) {
       if (!entry || typeof entry !== 'object') continue;
       const message = resultItemMessage(entry as { index?: number; detail?: unknown });
-      if (message) errorMessages.push(message);
+      if (message && !seenErrors.has(message)) {
+        seenErrors.add(message);
+        errorMessages.push(message);
+      }
     }
   }
   if (Array.isArray(record.results)) {
@@ -105,7 +109,10 @@ export function normalizeEpcisIngestResult(data: EpcisIngestResponse | null | un
       const failed = typeof statusCode === 'number' && statusCode >= 400;
       if (!failed) continue;
       const message = resultItemMessage(item as { index?: number; detail?: unknown; errors?: unknown; message?: string });
-      if (message && !errorMessages.includes(message)) errorMessages.push(message);
+      if (message && !seenErrors.has(message)) {
+        seenErrors.add(message);
+        errorMessages.push(message);
+      }
     }
   }
   return { total, accepted, rejected, errorMessages };
@@ -124,10 +131,14 @@ export function epcisErrorEventMessages(error: unknown): string[] {
   const source = isRecord(data.detail) ? data.detail : data;
   if (!Array.isArray(source.errors)) return [];
   const messages: string[] = [];
+  const seenMessages = new Set<string>();
   for (const entry of source.errors) {
     if (!isRecord(entry) || typeof entry.index !== 'number') continue;
     const message = resultItemMessage(entry as { index?: number; detail?: unknown });
-    if (message && !messages.includes(message)) messages.push(message);
+    if (message && !seenMessages.has(message)) {
+      seenMessages.add(message);
+      messages.push(message);
+    }
   }
   return messages;
 }