diff --git a/lib/emendate/unprocessable_tagger.rb b/lib/emendate/unprocessable_tagger.rb
index 88ff34f..66c9449 100644
--- a/lib/emendate/unprocessable_tagger.rb
+++ b/lib/emendate/unprocessable_tagger.rb
@@ -20,7 +20,9 @@ def call(...)
       /\d{2}xx-\d{2}-\d{2}/,
       /\d{3}x-\d{2}-\d{2}/,
       /^\d{3,4}S\d+$/,
-      /\d{4}-\d{2}-xx/
+      /\d{4}-\d{2}-xx/,
+      /^Unknown-\d{1,2}-Unknown$/i,
+      /^\d{1,2}\/\d\(\d\)\/\d{4}$/
     ]
     Re = Regexp.union(PATTERNS)