diff --git a/stdnum/eu/at_02.py b/stdnum/eu/at_02.py
index 610ef615..60b51643 100644
--- a/stdnum/eu/at_02.py
+++ b/stdnum/eu/at_02.py
@@ -32,6 +32,8 @@
 'ES2300047690558N'
 >>> compact('ES++()+23ZZZ4//7690558N')
 'ES23ZZZ47690558N'
+>>> compact('mt50zzz670169305t') # EPC262-08 Version 12.0 / 8.1.15 Malta, example identifier, lowercased
+'MT50ZZZ670169305T'
 >>> calc_check_digits('ESXXZZZ47690558N')
 '23'
 """
@@ -50,7 +52,7 @@
 def compact(number: str) -> str:
     """Convert the AT-02 number to the minimal representation. This strips
     the number of any valid separators and removes invalid characters."""
-    return clean(number, ' -/?:().m\'+"').strip().upper()
+    return clean(number, ' -/?:().,\'+"').strip().upper()
 
 
 def _to_base10(number: str) -> str: