diff --git a/lib/http-listener.js b/lib/http-listener.js
index dfb7eed..ed217ea 100644
--- a/lib/http-listener.js
+++ b/lib/http-listener.js
@@ -41,11 +41,18 @@ function mainHandler(req, res) {
             ( (req.query.is_outgoing || req.body.is_outgoing) && (!req.query.to && !req.body.to) )
         )
     ) {
+        logger.warn('Undefined parameter partner or from or to. #D254B7B454DB', {
+            partner: req.body.partner || req.query.partner,
+            is_outgoing: req.body.is_outgoing || req.query.is_outgoing,
+            from: req.body.from || req.query.from,
+            to: req.body.to || req.query.to,
+        });
         res.end('ERROR. Undefined parameter: partner or from or to');
         return;
     }
 
     if (!req.query.msg && !req.body.msg) {
+        logger.warn('Undefined parameter msg. #92996A497D12')
         res.end('ERROR. Undefined parameter: msg');
         return;
     }