diff --git a/package.json b/package.json
index 9df16cc..64895b2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@einfach-produktiv/invoicing",
-  "version": "0.2.6",
+  "version": "0.2.7",
   "private": true,
   "description": "Shared invoice / correction-invoice (Stornorechnung, Gutschrift) PDF generation and VAT-breakdown math, consumed as a git dependency by both the einfach-produktiv frontend and the payload backend — not published to npm.",
   "type": "module",
diff --git a/src/correctionInvoicePdf.tsx b/src/correctionInvoicePdf.tsx
index 8bbb58c..fd891db 100644
--- a/src/correctionInvoicePdf.tsx
+++ b/src/correctionInvoicePdf.tsx
@@ -132,6 +132,7 @@ export type CorrectionInvoiceItem = {
   variantName?: string | null;
   returnQuantity?: number;
   imageUrl?: string | null;
+  sku?: string | null;
 };
 
 export type CorrectionInvoiceOrder = {
@@ -303,6 +304,7 @@ function CorrectionInvoiceDocument({ kind, order, seller }: { kind: CorrectionIn
                     {item.variantName ? ` (${item.variantName})` : ""}
                   </Text>
                   {item.bundleContents ? <Text style={styles.bundleLine}>{item.bundleContents}</Text> : null}
+                  {item.sku ? <Text style={styles.bundleLine}>Art.-Nr. {item.sku}</Text> : null}
                 </View>
                 <Text style={styles.colQty}>{effectiveQuantity}</Text>
                 <Text style={styles.colPrice}>{formatPrice(item.unitPrice)}</Text>
diff --git a/src/einvoice/buildEInvoiceData.ts b/src/einvoice/buildEInvoiceData.ts
index 7ec54a6..b16f9a0 100644
--- a/src/einvoice/buildEInvoiceData.ts
+++ b/src/einvoice/buildEInvoiceData.ts
@@ -220,7 +220,18 @@ function buyerParty(name: string, street: string | null | undefined, zip: string
   };
 }
 
-type LineInput = { productName: string; variantName?: string | null; quantity: number; unitPrice: number; taxRatePercent: number };
+type LineInput = {
+  productName: string;
+  variantName?: string | null;
+  quantity: number;
+  unitPrice: number;
+  taxRatePercent: number;
+  // BT-155 (Item seller's identifier) when present — variant SKU if one
+  // was selected, else the product's own (see Orders.items.sku in the
+  // Payload backend). Omitted entirely when neither is set, same as the
+  // visual PDF's own optional "Art.-Nr." line.
+  sku?: string | null;
+};
 type ComputedLine = { item: LineInput; netCents: number };
 type RateGroup = { rate: number; lineNetCents: number; allowanceCents: number; chargeCents: number; taxableCents: number; taxCents: number };
 
@@ -337,6 +348,7 @@ function invoiceLines(lines: ComputedLine[], vatMode: VatMode): UblInvoice["cac:
       "cac:Item": {
         "cbc:Name": item.variantName ? `${item.productName} (${item.variantName})` : item.productName,
         "cac:ClassifiedTaxCategory": vatTaxCategory(item.taxRatePercent, vatMode),
+        ...(item.sku ? { "cac:SellersItemIdentification": { "cbc:ID": item.sku } } : {}),
       },
       // Unit price, not a summed/reconciled total — kept as the plain
       // (unrounded-to-cent) net unit price for reference; BR-CO-10 only
diff --git a/src/invoicePdf.tsx b/src/invoicePdf.tsx
index 6822fb9..fe3757a 100644
--- a/src/invoicePdf.tsx
+++ b/src/invoicePdf.tsx
@@ -160,6 +160,11 @@ export type InvoiceItem = {
   bundleContents?: string | null;
   variantName?: string | null;
   imageUrl?: string | null;
+  // Snapshot from the order (Orders.items.sku in the Payload backend) —
+  // variant SKU if one was selected, else the product's own, else absent.
+  // Shown next to productName only when actually set; a product/variant
+  // with no SKU configured renders exactly as before this field existed.
+  sku?: string | null;
 };
 
 export type InvoiceOrder = {
@@ -206,6 +211,10 @@ export type InvoiceOrder = {
   hasDifferentShippingAddress?: boolean;
   shippingFirstName?: string | null;
   shippingLastName?: string | null;
+  // Optional, mirrors companyName above — no shipping-side vatId (billing-
+  // only concept). Contact email/phone are handed to the shipping carrier,
+  // shown here for the customer's own reference on their invoice copy.
+  shippingCompanyName?: string | null;
   shippingDeliveryMethod?: "address" | "packstation" | null;
   shippingStreet?: string | null;
   shippingPackstationNumber?: string | null;
@@ -213,6 +222,8 @@ export type InvoiceOrder = {
   shippingZip?: string | null;
   shippingCity?: string | null;
   shippingCountry?: string | null;
+  shippingContactEmail?: string | null;
+  shippingContactPhone?: string | null;
   paymentMethodTitle: string;
   items: InvoiceItem[];
   subtotal: number;
@@ -345,6 +356,7 @@ export function InvoiceDocument({ order, seller }: { order: InvoiceOrder; seller
             {order.hasDifferentShippingAddress && (
               <View style={addressBlockStyle}>
                 <Text style={styles.addressLabel}>Lieferadresse</Text>
+                {order.shippingCompanyName && <Text style={styles.addressLine}>{order.shippingCompanyName}</Text>}
                 <Text style={styles.addressLine}>
                   {order.shippingFirstName} {order.shippingLastName}
                 </Text>
@@ -358,6 +370,8 @@ export function InvoiceDocument({ order, seller }: { order: InvoiceOrder; seller
                   {order.shippingZip} {order.shippingCity}
                 </Text>
                 <Text style={styles.addressLine}>{order.shippingCountry}</Text>
+                {order.shippingContactEmail && <Text style={styles.addressLine}>{order.shippingContactEmail}</Text>}
+                {order.shippingContactPhone && <Text style={styles.addressLine}>{order.shippingContactPhone}</Text>}
               </View>
             )}
           </View>
@@ -396,6 +410,7 @@ export function InvoiceDocument({ order, seller }: { order: InvoiceOrder; seller
                     {item.variantName ? ` (${item.variantName})` : ""}
                   </Text>
                   {item.bundleContents ? <Text style={styles.bundleLine}>{item.bundleContents}</Text> : null}
+                  {item.sku ? <Text style={styles.bundleLine}>Art.-Nr. {item.sku}</Text> : null}
                 </View>
                 <Text style={styles.colQty}>{item.quantity}</Text>
                 <Text style={styles.colPrice}>{formatPrice(item.unitPrice)}</Text>