diff --git a/peppol-id/src/main/java/com/helger/peppolid/peppol/doctype/EPredefinedDocumentTypeIdentifier.java b/peppol-id/src/main/java/com/helger/peppolid/peppol/doctype/EPredefinedDocumentTypeIdentifier.java
index ee19b5c3..98b87fe7 100644
--- a/peppol-id/src/main/java/com/helger/peppolid/peppol/doctype/EPredefinedDocumentTypeIdentifier.java
+++ b/peppol-id/src/main/java/com/helger/peppolid/peppol/doctype/EPredefinedDocumentTypeIdentifier.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2015-2024 Philip Helger
+ * philip[at]helger[dot]com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.helger.peppolid.peppol.doctype;
 
 import java.time.LocalDate;
diff --git a/peppol-id/src/main/java/com/helger/peppolid/peppol/pidscheme/EPredefinedParticipantIdentifierScheme.java b/peppol-id/src/main/java/com/helger/peppolid/peppol/pidscheme/EPredefinedParticipantIdentifierScheme.java
index 945756ad..fd3707af 100644
--- a/peppol-id/src/main/java/com/helger/peppolid/peppol/pidscheme/EPredefinedParticipantIdentifierScheme.java
+++ b/peppol-id/src/main/java/com/helger/peppolid/peppol/pidscheme/EPredefinedParticipantIdentifierScheme.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2015-2024 Philip Helger
+ * philip[at]helger[dot]com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.helger.peppolid.peppol.pidscheme;
 
 import java.time.LocalDate;
diff --git a/peppol-id/src/main/java/com/helger/peppolid/peppol/process/EPredefinedProcessIdentifier.java b/peppol-id/src/main/java/com/helger/peppolid/peppol/process/EPredefinedProcessIdentifier.java
index 47330a82..040be667 100644
--- a/peppol-id/src/main/java/com/helger/peppolid/peppol/process/EPredefinedProcessIdentifier.java
+++ b/peppol-id/src/main/java/com/helger/peppolid/peppol/process/EPredefinedProcessIdentifier.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2015-2024 Philip Helger
+ * philip[at]helger[dot]com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.helger.peppolid.peppol.process;
 
 import com.helger.commons.annotation.CodingStyleguideUnaware;
diff --git a/peppol-id/src/main/java/com/helger/peppolid/peppol/transportprofile/EPredefinedTransportProfileIdentifier.java b/peppol-id/src/main/java/com/helger/peppolid/peppol/transportprofile/EPredefinedTransportProfileIdentifier.java
index bde0b539..429404af 100644
--- a/peppol-id/src/main/java/com/helger/peppolid/peppol/transportprofile/EPredefinedTransportProfileIdentifier.java
+++ b/peppol-id/src/main/java/com/helger/peppolid/peppol/transportprofile/EPredefinedTransportProfileIdentifier.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2015-2024 Philip Helger
+ * philip[at]helger[dot]com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.helger.peppolid.peppol.transportprofile;
 
 import java.time.LocalDate;