diff --git a/bin/sim_job b/bin/sim_job
index 06816e3c66fcad08a175a1f8a6f3df8dcddffe03..2d9e6ed832f6355aac99cc50e58ee5f71e2f6b2f 100755
--- a/bin/sim_job
+++ b/bin/sim_job
@@ -65,6 +65,7 @@ CONFIG[:creds] = {}
 require_relative "../lib/async_braintree"
 require_relative "../lib/blather_notify"
 require_relative "../lib/customer_repo"
+require_relative "../lib/expiring_lock"
 require_relative "../lib/low_balance"
 require_relative "../lib/postgres"
 require_relative "../lib/sim_repo"
@@ -170,10 +171,12 @@ class SimWarn
 	include SimAction
 
 	def notify
-		m = Blather::Stanza::Message.new
-		m.body = "Your SIM #{iccid} only has " \
-		         "#{(@sim.remaining_usage_kb / 1024).to_i} MB left"
-		customer.stanza_to(m)
+		ExpiringLog.new("jmp_customer_sim_warn-#{customer.customer_id}") do
+			m = Blather::Stanza::Message.new
+			m.body = "Your SIM #{iccid} only has " \
+				"#{(@sim.remaining_usage_kb / 1024).to_i} MB left"
+			customer.stanza_to(m)
+		end
 	end
 
 	def call
@@ -194,9 +197,11 @@ class SimAnnual
 	include SimAction
 
 	def notify
-		m = Blather::Stanza::Message.new
-		m.body = "Your SIM #{iccid} only has #{@sim.remaining_days} days left"
-		customer.stanza_to(m)
+		ExpiringLog.new("jmp_customer_sim_annual-#{customer.customer_id}") do
+			m = Blather::Stanza::Message.new
+			m.body = "Your SIM #{iccid} only has #{@sim.remaining_days} days left"
+			customer.stanza_to(m)
+		end
 	end
 
 	def annual_price