diff --git a/coin.rb b/coin.rb
index 4c803d7..5f0fd83 100644
--- a/coin.rb
+++ b/coin.rb
@@ -30,22 +30,37 @@ def get_coin_count(scoreboard, user)
   scoreboard[user] || 0
 end
 
-def increment_coin(scoreboard, user)
+def increment_coin(user)
+  scoreboard = load_scoreboard()
   coins = get_coin_count(scoreboard, user) + 1
   scoreboard[user] = coins
 
   File.write(SCOREBOARD, scoreboard.to_yaml)
 end
 
+def empty_coin(user)
+  scoreboard = load_scoreboard()
+  scoreboard[user] = 0
+
+  File.write(SCOREBOARD, scoreboard.to_yaml)
+end
+
 def plural(string, count)
   "#{count} #{string}#{count != 1 ? 's' : ''}"
 end
 
-bot.message(with_text: 'GET COIN' ) do |event|
+bot.message(in: Integer(ENV['BOT_CHANNEL'])) do |event|
+  puts event.message
+  if event.message.attachments.count { |x| x.filename.scan(/coin*/).length > 0 } > 0
+    event.respond "Oh no! Looks like you tried to post a fradulent coin! #{event.author.name}, your coin balance has now been emptied. Let that be a lesson for next time!"
+    empty_coin(event.author.id)
+  end
+end
+
+bot.message(content: 'GET COIN' ) do |event|
   # update score
   if coin_state_active
-    scoreboard = load_scoreboard()
-    increment_coin(scoreboard, event.author.id)
+    increment_coin(event.author.id)
 
     coin_state_active = false