update

ts/formats/cii/facturx/facturx.decoder.ts

@@ -72,7 +72,19 @@ export class FacturXDecoder extends CIIBaseDecoder {
     const totalAmount = this.getNumber('//ram:GrandTotalAmount');
 
     // Extract notes
-    const notes = this.extractNotes();
+    const allNotes = this.extractNotes();
+
+    // Extract subject and notes separately
+    let subject = `Invoice ${invoiceId}`;
+    let notes = [...allNotes];
+    
+    // If the first note doesn't look like a payment term or other standard note,
+    // treat it as the subject
+    if (allNotes.length > 0 && !allNotes[0].toLowerCase().includes('due in') && 
+        !allNotes[0].toLowerCase().includes('payment')) {
+      subject = allNotes[0];
+      notes = allNotes.slice(1); // Remove subject from notes
+    }
 
     // Check for reverse charge
     const reverseCharge = this.exists('//ram:SpecifiedTradeAllowanceCharge/ram:ReasonCode[text()="62"]');
@@ -93,7 +105,7 @@ export class FacturXDecoder extends CIIBaseDecoder {
       incidenceId: invoiceId,
       from: seller,
       to: buyer,
-      subject: `Invoice ${invoiceId}`,
+      subject: subject,
       items: items,
       dueInDays: dueInDays,
       reverseCharge: reverseCharge,