diff --git a/nep-5.mediawiki b/nep-5.mediawiki
index 03d78b26..c1c43ca9 100755
--- a/nep-5.mediawiki
+++ b/nep-5.mediawiki
@@ -1,7 +1,7 @@
 <pre>
   NEP: 5
   Title: Token Standard
-  Author: Tyler Adams <lllwvlvwlll@gmail.com>, luodanwg <luodan.wg@gmail.com>, tanyuan <tanyuan666@gmail.com>, Alan Fong <anfn@umich.edu>
+  Author: Tyler Adams <lllwvlvwlll@gmail.com>, luodanwg <luodan.wg@gmail.com>, tanyuan <tanyuan666@gmail.com>, Alan Fong <anfn@umich.edu>, Jaime Kindelán <srbelane@gmail.com>
   Type: Standard
   Status: Final
   Created: 2017-08-10
@@ -93,6 +93,12 @@ If the <code>to</code> address is a deployed contract, the function SHOULD check
 
 If the transfer is not processed, the function SHOULD return <code>false</code>.
 
+The function MUST call <code>onPayment</code> method AFTER fire the <code>Transfer</code> event if the receiver is a deployed contract. If the receiver doesn't want to receive this transfer it MUST call <code>ABORT</code>.
+
+<pre>
+public static void onPayment(BigInteger amount)
+</pre>
+
 ===Events===
 
 ====transfer====