diff --git a/App.tsx b/App.tsx
index 110f826..2befa0e 100644
--- a/App.tsx
+++ b/App.tsx
@@ -5,7 +5,7 @@ import Dashboard from './components/Dashboard';
 import FilterBar from './components/FilterBar';
 import AIChat from './components/AIChat';
 import CrazeLogo from './components/CrazeLogo';
-import { processCSV, processExcel, filterData, aggregateData, processAdsCSV, processAdsExcel, mergeSalesAndAdsData, processTrafficExcel, processStockExcel, filterAdsData, calculateForecastViewData, processVendorStockExcel, processUKInventoryExcel, calculateVelocityMap, getUniqueValues, processForecastExcel, processBuyBoxExcel, processBSRExcel, filterBsrData } from './services/dataProcessor';
+import { processCSV, processExcel, filterData, aggregateData, processAdsCSV, processAdsExcel, mergeSalesAndAdsData, processTrafficExcel, processStockExcel, filterAdsData, calculateForecastViewData, processVendorStockExcel, processUKInventoryExcel, calculateVelocityMap, getUniqueValues, processForecastExcel, processBuyBoxExcel, processBSRExcel, filterBsrData, isAllowedCustomer, isRealSale } from './services/dataProcessor';
 import { SalesRecord, FilterState, AggregatedData, AdsRecord, TrafficRecord, ForecastRecord, ProductForecastData, ActiveExperiment, BSRRecord } from './types';
 import { queryGemini } from './services/geminiService';
 import { ChartIcon, TableIcon, CloseIcon, TrendingIcon, MegaphoneIcon } from './components/Icons';
@@ -537,18 +537,11 @@ const App: React.FC = () => {
   const filteredData = useMemo(() => {
     const baseFiltered = filterData(rawData, deferredFilters, stockMap, vendorStockMap, top50Mode);
     
-    // Safety check: Final redundancy to ensure marketing/ad spend records never reach the dashboard cards.
-    // This is a "double-lock" to prevent revenue inflation even if the service layer fails to update.
+    // DEFINITIVE REVENUE FILTER (BRUTE FORCE):
+    // This is the absolute final safeguard against revenue inflation.
+    // It enforces the strict isRealSale and isAllowedCustomer rules at the UI layer.
     return baseFiltered.filter(r => {
-        if (r.units === 0) return false;
-        
-        // Marketplace check
-        const normC = r.customer?.trim().toLowerCase();
-        const isAmazon = normC.startsWith('amazon') || normC === 'pan-eu';
-        const isOnlyCountry = ['uk', 'de', 'it', 'fr', 'es', 'nl', 'se', 'pl', 'be'].includes(normC);
-        
-        if (isOnlyCountry && !normC.startsWith('amazon')) return false;
-        return isAmazon;
+        return isAllowedCustomer(r.customer) && isRealSale(r);
     });
   }, [rawData, deferredFilters, stockMap, vendorStockMap, top50Mode]);
   console.timeEnd('filteredData');
diff --git a/services/dataProcessor.ts b/services/dataProcessor.ts
index b1ac171..8c4964e 100644
--- a/services/dataProcessor.ts
+++ b/services/dataProcessor.ts
@@ -307,16 +307,48 @@ const isAllowedCustomer = (customer: string): boolean => {
     if (!customer) return false;
     const normCustomer = customer.trim().toLowerCase();
     
-    // Strict business rule: Only records from recognized Amazon marketplaces are included in Sell-Out revenue.
-    // This excludes marketing spend, financial adjustments, and non-Amazon channels.
-    const isAmazon = normCustomer.startsWith('amazon') || normCustomer === 'pan-eu';
+    // STRICT WHITELIST: Only these Exact Names are valid for Sell-Out Revenue.
+    const whitelist = [
+        'amazon de', 'amazon uk', 'amazon fr', 'amazon es', 'amazon it', 
+        'amazon nl', 'amazon pl', 'amazon be', 'amazon se', 'amazon sc', 
+        'pan-eu'
+    ];
     
-    // Additional check: Ensure it's not JUST a country code (often used in ad-spend records)
-    const isOnlyCountryCode = ['uk', 'de', 'it', 'fr', 'es', 'nl', 'se', 'pl', 'be'].includes(normCustomer);
+    if (!whitelist.includes(normCustomer)) return false;
+    return true;
+};
 
-    if (isOnlyCountryCode && !normCustomer.startsWith('amazon')) return false;
+/**
+ * Validates if a record is a real sale or a marketing/spend entry.
+ * Marketing entries often have placeholder units (1) or missing ASINs.
+ */
+export const isRealSale = (record: any): boolean => {
+    const asin = String(record.asin || '').toUpperCase().trim();
+    const sku = String(record.sku || '').toUpperCase().trim();
+    const title = String(record.title || '').toUpperCase().trim();
+    const line = String(record.line || '').toUpperCase().trim();
 
-    return isAmazon;
+    // 1. Strict ASIN Format: Amazon ASINs are 10 letters/numbers
+    if (!asin || asin.length < 5 || asin.length > 20) return false;
+    
+    // 2. Negative Keywords: Exclude records that suggest marketing or spend instead of a product
+    const negativeKeywords = [
+        'SPEND', 'MARKETING', 'ADVERTISING', 'AD-SPEND', 'AD_SPEND', 
+        'SUMMARY', 'TOTAL', 'ADJUSTMENT', 'FINANCIAL', 'CREDIT', 'FEE'
+    ];
+    
+    for (const kw of negativeKeywords) {
+        if (asin.includes(kw)) return false;
+        if (sku.includes(kw)) return false;
+        if (title.includes(kw)) return false;
+        if (line.includes(kw)) return false;
+    }
+
+    // 3. Units check: Real sales must have units. 
+    // Records with 0 units or negative units (unless it's a return, but usually returns have an ASIN)
+    if (!record.units || record.units <= 0) return false;
+
+    return true;
 };
 
 // --- SALES / SELL OUT MAPPING ---
@@ -1165,7 +1197,7 @@ export const filterData = (
         // These filters ensure that only valid Amazon sales are aggregated, 
         // excluding ad spend and marketing records that might be present in the raw source.
         if (!isAllowedCustomer(item.customer)) return false;
-        if (item.units === 0) return false;
+        if (!isRealSale(item)) return false;
 
         // 1. Month Logic: Handle "Apr-23" matching "Apr" filter
         const recordMonth = item.month; // e.g. "Apr-23"