diff --git a/frontend/src/app/modules/shared/components/parts-table/parts-table.component.html b/frontend/src/app/modules/shared/components/parts-table/parts-table.component.html
index f8fae6afcb..0483046d65 100644
--- a/frontend/src/app/modules/shared/components/parts-table/parts-table.component.html
+++ b/frontend/src/app/modules/shared/components/parts-table/parts-table.component.html
@@ -61,7 +61,7 @@
       <div class="icon-container">
 
         <div *ngIf="tableType === TableType.AS_BUILT_OWN" class="action-button-tile"
-             matTooltip="{{(roleService.isAdmin() ? 'routing.unauthorized' : (!isAllowedToCreateAlert() && !isAllowedToCreateInvestigation() ? 'routing.partMismatch' : 'table.createNotification')) | i18n}}"
+             matTooltip="{{(roleService.isAdmin() ? 'routing.unauthorized' : (!isAllowedToCreateAlert() && !isAllowedToCreateInvestigation() ? ( selectionContainsCustomerPart() ? 'routing.hasCustomerPart':'routing.partMismatch') : 'table.createNotification')) | i18n}}"
              matTooltipClass="table--header--tooltip"
              matTooltipPosition="above"
              [class.mdc-tooltip--multiline]="true"
diff --git a/frontend/src/app/modules/shared/components/parts-table/parts-table.component.ts b/frontend/src/app/modules/shared/components/parts-table/parts-table.component.ts
index e2830cd84b..a4b5e8e70d 100644
--- a/frontend/src/app/modules/shared/components/parts-table/parts-table.component.ts
+++ b/frontend/src/app/modules/shared/components/parts-table/parts-table.component.ts
@@ -41,8 +41,8 @@ import { TableSettingsService } from '@core/user/table-settings.service';
 import { UserService } from '@core/user/user.service';
 import { MainAspectType } from '@page/parts/model/mainAspectType.enum';
 import { Owner } from '@page/parts/model/owner.enum';
-import { ImportState, Part } from '@page/parts/model/parts.model';
 import { PartReloadOperation } from '@page/parts/model/partReloadOperation.enum';
+import { ImportState, Part } from '@page/parts/model/parts.model';
 import { MultiSelectAutocompleteComponent } from '@shared/components/multi-select-autocomplete/multi-select-autocomplete.component';
 import { TableType } from '@shared/components/multi-select-autocomplete/table-type.model';
 import { PartsTableConfigUtils } from '@shared/components/parts-table/parts-table-config.utils';
@@ -176,6 +176,11 @@ export class PartsTableComponent implements OnInit {
     return !hasDifferentOwner;
   }
 
+  selectionContainsCustomerPart(): boolean {
+    const selected = this.selection.selected as Part[];
+    return selected.some(part => part.owner === Owner.CUSTOMER);
+  }
+
   handleKeyDownQualityNotificationClicked(event: KeyboardEvent){
     if (event.key === 'Enter') {
       this.createQualityNotificationClicked();
diff --git a/frontend/src/assets/locales/de/common.json b/frontend/src/assets/locales/de/common.json
index 3cbb8dc813..e003dffa24 100644
--- a/frontend/src/assets/locales/de/common.json
+++ b/frontend/src/assets/locales/de/common.json
@@ -13,7 +13,8 @@
     "adminBpn": "BPN - EDC Konfiguration",
     "adminImport": "Datenbereitstellung",
     "adminPolicies" : "Richtlinienverwaltung",
-    "partMismatch": "Die ausgewählten Teile müssen vom selben Eigentümer sein, um ein Qualitätsthema zu erstellen (Eigen, Lieferant)",
+    "partMismatch" : "Alle ausgewählten Teile müssen vom selben Eigentümer sein, um ein Qualitätsthema zu erstellen (Lieferant/Eigene).",
+    "hasCustomerPart" : "Die Erstellung einer Qualitätsmitteilung für Kundenteile ist nicht möglich. Alle ausgewählten Teile müssen vom selben Eigentümer sein (Lieferant/Eigene).",
     "unauthorized": "Die Funktion ist aufgrund einer fehlenden Rolle deaktiviert. Bitten Sie Ihren Administrator, die erforderliche Rolle für die Funktion bereitzustellen.",
     "notificationInProcess" : "Aktionen für Qualitätsthemen sind während dem Verarbeitungsprozess nicht verfügbar.",
     "notAllowedForAsPlanned": "Diese Funktion ist für Produkte im Lebenszyklus \"AsPlanned\" nicht verfügbar.",
diff --git a/frontend/src/assets/locales/en/common.json b/frontend/src/assets/locales/en/common.json
index 969c2d46b3..dc6f3b6cb0 100644
--- a/frontend/src/assets/locales/en/common.json
+++ b/frontend/src/assets/locales/en/common.json
@@ -12,7 +12,8 @@
     "adminBpn": "BPN - EDC configuration",
     "adminImport": "Data provisioning",
     "adminPolicies" : "Policy management",
-    "partMismatch": "Selected parts must have same owner to create quality topic (Own, Supplier)",
+    "partMismatch" : "All selected parts must be from the same owner to create a quality notification (Supplier/Own).",
+    "hasCustomerPart" : "It is not possible to create a quality notification for customer parts. All selected parts must be from the same owner (Supplier/Own).",
     "unauthorized": "Functionality is disabled because of missing role. Ask your administrator to provide the required role for the functionality.",
     "notificationInProcess" : "Actions are unavailable on notifications in processing state",
     "notAllowedForAsPlanned": "This function is not available for Parts in the Lifecycle \"AsPlanned\".",