diff --git a/MDfile/RELEASE_NOTES_v2.8.6.md b/MDfile/RELEASE_NOTES_v2.8.6.md
new file mode 100644
index 0000000..a4ca3ea
--- /dev/null
+++ b/MDfile/RELEASE_NOTES_v2.8.6.md
@@ -0,0 +1,13 @@
+# BMC Hub v2.8.6
+
+## e-conomic ordreeksport
+
+- Bruger kundens gyldige standardlayout fra e-conomic i stedet for et ugyldigt lokalt standardnummer.
+- Kontrollerer produktnumre mod e-conomic inden eksport.
+- Ukendte lokale produktnumre eksporteres som fritekstlinjer uden ugyldig produktreference.
+- Bevarer produktreferencen, når produktet findes i e-conomic.
+
+## Verifikation
+
+- Fokuserede regressionstests består.
+- Python-syntaks og diff-kontrol består.
diff --git a/VERSION b/VERSION
index 766d708..e43686a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.8.5
+2.8.6
diff --git a/app/modules/orders/backend/economic_export.py b/app/modules/orders/backend/economic_export.py
index 9eaf0c4..9218028 100644
--- a/app/modules/orders/backend/economic_export.py
+++ b/app/modules/orders/backend/economic_export.py
@@ -2,6 +2,7 @@ import json
 import logging
 from datetime import date
 from typing import Any, Dict, List, Optional
+from urllib.parse import quote
 
 import aiohttp
 from fastapi import HTTPException
@@ -195,6 +196,43 @@ class OrdreEconomicExportService:
                     detail="e-conomic-kunden mangler betalingsbetingelser eller momszone",
                 )
 
+            product_numbers = {
+                str(line.get("product", {}).get("productNumber") or "").strip()
+                for line in economic_lines
+                if line.get("product")
+            }
+            valid_product_numbers = set()
+            for product_number in product_numbers:
+                if not product_number:
+                    continue
+                async with session.get(
+                    f"{self.api_url}/products/{quote(product_number, safe='')}",
+                    headers=self._headers(),
+                    timeout=aiohttp.ClientTimeout(total=30),
+                ) as product_response:
+                    if product_response.status == 200:
+                        valid_product_numbers.add(product_number)
+                    elif product_response.status == 404:
+                        logger.warning(
+                            "e-conomic product %s does not exist; exporting matching lines as free text",
+                            product_number,
+                        )
+                    else:
+                        product_text = await product_response.text()
+                        raise HTTPException(
+                            status_code=502,
+                            detail=_economic_error_message(product_response.status, product_text),
+                        )
+
+            skipped_product_numbers = sorted(product_numbers - valid_product_numbers)
+            for line in economic_lines:
+                product_number = str(line.get("product", {}).get("productNumber") or "").strip()
+                if product_number and product_number not in valid_product_numbers:
+                    line.pop("product", None)
+
+            customer_layout = economic_customer.get("layout") or {}
+            resolved_layout_number = customer_layout.get("layoutNumber") or self.default_layout
+
             payload: Dict[str, Any] = {
                 "date": date.today().isoformat(),
                 "currency": str(economic_customer.get("currency") or "DKK"),
@@ -209,7 +247,7 @@ class OrdreEconomicExportService:
                     "vatZone": vat_zone,
                 },
                 "layout": {
-                    "layoutNumber": int(layout_number or self.default_layout),
+                    "layoutNumber": int(resolved_layout_number),
                 },
                 "lines": economic_lines,
             }
@@ -229,6 +267,7 @@ class OrdreEconomicExportService:
                         "read_only": self.read_only,
                         "dry_run": self.dry_run,
                         "user_id": user_id,
+                        "skipped_product_numbers": skipped_product_numbers,
                         "payload": payload,
                     },
                 }
@@ -263,6 +302,7 @@ class OrdreEconomicExportService:
                         "customer_name": customer.get("name"),
                         "selected_line_count": len(selected_lines),
                         "user_id": user_id,
+                        "skipped_product_numbers": skipped_product_numbers,
                         "economic_response": export_result,
                     },
                 }