diff --git a/src/main/java/org/gcube/informationsystem/utils/ReservedUUID.java b/src/main/java/org/gcube/informationsystem/utils/ReservedUUID.java
new file mode 100644
index 0000000..7aeb195
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/utils/ReservedUUID.java
@@ -0,0 +1,41 @@
+package org.gcube.informationsystem.utils;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+
+public final class ReservedUUID {
+
+	public static final Set<String> RESERVED_UUID_STRING;
+	public static final Set<UUID> RESERVED_UUID;
+	
+	static {
+		RESERVED_UUID_STRING = new HashSet<>();
+		RESERVED_UUID = new HashSet<>();
+		
+		String[] uuidValidCharacters = {"1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
+		
+		for(String string : uuidValidCharacters) {
+			String uuidString = "00000000-0000-0000-0000-000000000000";
+			uuidString.replaceAll("0", string);
+			RESERVED_UUID_STRING.add(uuidString);
+			RESERVED_UUID.add(UUID.fromString(uuidString));
+		}
+	}
+	
+	public static boolean isReservedUUID(UUID uuid) {
+		return RESERVED_UUID.contains(uuid);
+	}
+	
+	public static boolean isReservedUUID(String uuid) {
+		return RESERVED_UUID_STRING.contains(uuid);
+	}
+	
+	public static Set<String> allUUIDAsString(){
+		return new HashSet<>(RESERVED_UUID_STRING);
+	}
+	
+	public static Set<UUID> allUUID(){
+		return new HashSet<>(RESERVED_UUID);
+	}
+}