diff --git a/.env_example b/.env_example
index b680d60..9927eb7 100644
--- a/.env_example
+++ b/.env_example
@@ -42,7 +42,6 @@ BARCODE_MINCODELENGTH=3
 # 💾 Show backup button in the top navigation bar (1 = show, 0 = hide)
 ADMIN_BUTTON_SWITCH=1
 
-
 #############################################
 # 🏫 BUSINESS CONFIGURATION
 #############################################
@@ -152,4 +151,9 @@ USERLABEL_LINE_3=["User.schoolGrade","90%","3%","35vw","2pt","black",12]
 
 # 🔲 Barcode for user labels
 # Format: [top, left, width, height, version]
-USERLABEL_BARCODE=["80%","63%","3cm","1.6cm","code128"]
\ No newline at end of file
+USERLABEL_BARCODE=["80%","63%","3cm","1.6cm","code128"]
+
+# Prefix und Suffix für den Barcode. 
+# Beispiele: Escape: \x1B | Enter: \x0D | Tabulator: \x09 | Backspace: \x08 | Line Feed: \x0A | Home (Pos 1): \x01
+USERLABEL_BARCODE_PREFIX=""  # Optionales Steuerzeichen vor Eingabe der Ausweisnummer (z.B. ESC)
+USERLABEL_BARCODE_SUFFIX=""  # Suffix für den Barcode (z.B. um mit einem Zeilenumbruch zu enden)
diff --git a/pages/api/report/userlabels/index.tsx b/pages/api/report/userlabels/index.tsx
index cfdb0e7..26a7256 100644
--- a/pages/api/report/userlabels/index.tsx
+++ b/pages/api/report/userlabels/index.tsx
@@ -94,6 +94,18 @@ const barcodeMinLength: number =
     ? parseInt(process.env.BARCODE_MINCODELENGTH)
     : DEFAULT_BARCODE_MINCODELENGTH;
 
+// Postfix & Prefix for Barcode
+// Hilfs-Funktion zum "Auflösen" von Hex-Strings aus Barcode Prefix/Suffix
+const parseEnv = (str: string) => 
+  str.replace(/\\x([0-9A-Fa-f]{2})/g, (_, hex) => String.fromCharCode(parseInt(hex, 16)))
+     .replace(/\\r/g, "\r")
+     .replace(/\\n/g, "\n")
+     .replace(/\\t/g, "\t");
+
+const barcodePrefix = parseEnv(process.env.USERLABEL_BARCODE_PREFIX || "");
+const barcodeSuffix = parseEnv(process.env.USERLABEL_BARCODE_SUFFIX || "");
+
+
 // =============================================================================
 // Styles
 // =============================================================================
@@ -221,13 +233,15 @@ const generateBarcode = async (id: string) => {
 
   try {
     const png = await bwipjs.toBuffer({
-      bcid: BARCODE_SETTINGS[4], // Barcode type (e.g., 'code128')
-      text: barId,
+      bcid: BARCODE_SETTINGS[4],
+      text: barcodePrefix + barId + barcodeSuffix,
+      alttext: barId, // Zeigt unten nur die Nummer an
       scale: 3,
+      parse: true,
       height: 10,
       includetext: true,
       textxalign: "center",
-    });
+  });
 
     return (
       <PdfImage