diff --git a/lib/admin_actions/cancel.rb b/lib/admin_actions/cancel.rb
index bffce6d339d53ac27e5fb560ffe38d5b5d4df5bb..44257d6af9ef287d99299bf0b9b0d38028eae22f 100644
--- a/lib/admin_actions/cancel.rb
+++ b/lib/admin_actions/cancel.rb
@@ -6,6 +6,7 @@ class AdminAction
 			m = Blather::Stanza::Message.new
 			m.from = CONFIG[:notify_from]
 			m.body = "Your JMP account has been cancelled."
+			raise "Customer not registered" unless customer.registered?
 			customer.stanza_to(m).then {
 				EMPromise.all([
 					Churnbuster.new.cancellation(customer),