diff --git a/bin/billing_monthly_cronjob b/bin/billing_monthly_cronjob
index 598e9773cdef207ab0efa91d5bf081389629592c..f01c6faa181b1d2be74eb84367367da5692de1b3 100755
--- a/bin/billing_monthly_cronjob
+++ b/bin/billing_monthly_cronjob
@@ -180,6 +180,7 @@ class ExpiredCustomer
 		end
 
 		def send_notification
+			raise "No JID for #{customer_id}, cannot notify" unless jid
 			BlatherNotify.say(
 				CONFIG[:notify_using][:target].call(jid),
 				CONFIG[:notify_using][:body].call(