diff --git a/src/main/java/org/eclipse/tractusx/managedidentitywallets/constant/StringPool.java b/src/main/java/org/eclipse/tractusx/managedidentitywallets/constant/StringPool.java
index 753afcfe6..b6212be0d 100644
--- a/src/main/java/org/eclipse/tractusx/managedidentitywallets/constant/StringPool.java
+++ b/src/main/java/org/eclipse/tractusx/managedidentitywallets/constant/StringPool.java
@@ -103,5 +103,5 @@ private StringPool() {
     public static final String PRIVATE_KEY = "PRIVATE KEY";
     public static final String PUBLIC_KEY = "PUBLIC KEY";
 
-    public static final String BPN_NOT_FOUND = "Invalid token, BPN not found";
+    public static final String BPN_NOT_FOUND = "Missing required claim 'BPN'";
 }