diff --git a/htdocs/public/paybox/paymentko.php b/htdocs/public/paybox/paymentko.php
index ec5c915b789..0b6635fa390 100644
--- a/htdocs/public/paybox/paymentko.php
+++ b/htdocs/public/paybox/paymentko.php
@@ -56,7 +56,11 @@ $langs->load("paypal");
  * View
  */
 
-dol_syslog("Callback url when a PayBox payment was canceled. query_string=".(empty($_SERVER["QUERY_STRING"])?'':$_SERVER["QUERY_STRING"])." script_uri=".(empty($_SERVER["SCRIPT_URI"])?'':$_SERVER["SCRIPT_URI"]));
+dol_syslog("Callback url when a PayBox payment was canceled. query_string=".(empty($_SERVER["QUERY_STRING"])?'':$_SERVER["QUERY_STRING"])." script_uri=".(empty($_SERVER["SCRIPT_URI"])?'':$_SERVER["SCRIPT_URI"]), LOG_DEBUG, 0, '_paybox');
+
+$tracepost = "";
+foreach($_POST as $k => $v) $tracepost .= "{$k} - {$v}\n";
+dol_syslog("POST=".$tracepost, LOG_DEBUG, 0, '_paybox');
 
 llxHeaderPayBox($langs->trans("PaymentForm"));
 
diff --git a/htdocs/public/paybox/paymentok.php b/htdocs/public/paybox/paymentok.php
index 41fc96c19d6..d46ae4f33a7 100644
--- a/htdocs/public/paybox/paymentok.php
+++ b/htdocs/public/paybox/paymentok.php
@@ -55,7 +55,11 @@ $langs->load("paypal");
  * View
  */
 
-dol_syslog("Callback url when a PayBox payment was done. query_string=".(empty($_SERVER["QUERY_STRING"])?'':$_SERVER["QUERY_STRING"])." script_uri=".(empty($_SERVER["SCRIPT_URI"])?'':$_SERVER["SCRIPT_URI"]));
+dol_syslog("Callback url when a PayBox payment was done. query_string=".(empty($_SERVER["QUERY_STRING"])?'':$_SERVER["QUERY_STRING"])." script_uri=".(empty($_SERVER["SCRIPT_URI"])?'':$_SERVER["SCRIPT_URI"]), LOG_DEBUG, 0, '_paybox');
+
+$tracepost = "";
+foreach($_POST as $k => $v) $tracepost .= "{$k} - {$v}\n";
+dol_syslog("POST=".$tracepost, LOG_DEBUG, 0, '_paybox');
 
 llxHeaderPayBox($langs->trans("PaymentForm"));
 
diff --git a/htdocs/public/paypal/paymentko.php b/htdocs/public/paypal/paymentko.php
index 3af51addec9..610e68c93e3 100755
--- a/htdocs/public/paypal/paymentko.php
+++ b/htdocs/public/paypal/paymentko.php
@@ -64,7 +64,12 @@ $langs->load("paypal");
  * View
  */
 
-dol_syslog("Callback url when a PayPal payment was canceled. query_string=".(empty($_SERVER["QUERY_STRING"])?'':$_SERVER["QUERY_STRING"])." script_uri=".(empty($_SERVER["SCRIPT_URI"])?'':$_SERVER["SCRIPT_URI"]));
+dol_syslog("Callback url when a PayPal payment was canceled. query_string=".(empty($_SERVER["QUERY_STRING"])?'':$_SERVER["QUERY_STRING"])." script_uri=".(empty($_SERVER["SCRIPT_URI"])?'':$_SERVER["SCRIPT_URI"]), LOG_DEBUG, 0, '_paypal');
+
+$tracepost = "";
+foreach($_POST as $k => $v) $tracepost .= "{$k} - {$v}\n";
+dol_syslog("POST=".$tracepost, LOG_DEBUG, 0, '_paypal');
+
 
 llxHeaderPaypal($langs->trans("PaymentForm"));
 
diff --git a/htdocs/public/paypal/paymentok.php b/htdocs/public/paypal/paymentok.php
index 3a0b56f62a1..45cd6f46014 100755
--- a/htdocs/public/paypal/paymentok.php
+++ b/htdocs/public/paypal/paymentok.php
@@ -92,7 +92,12 @@ if (empty($PAYPAL_API_SIGNATURE))
  * View
  */
 
-dol_syslog("Callback url when a PayPal payment was done. query_string=".(empty($_SERVER["QUERY_STRING"])?'':$_SERVER["QUERY_STRING"])." script_uri=".(empty($_SERVER["SCRIPT_URI"])?'':$_SERVER["SCRIPT_URI"]));
+dol_syslog("Callback url when a PayPal payment was done. query_string=".(empty($_SERVER["QUERY_STRING"])?'':$_SERVER["QUERY_STRING"])." script_uri=".(empty($_SERVER["SCRIPT_URI"])?'':$_SERVER["SCRIPT_URI"]), LOG_DEBUG, 0, '_paypal');
+
+$tracepost = "";
+foreach($_POST as $k => $v) $tracepost .= "{$k} - {$v}\n";
+dol_syslog("POST=".$tracepost, LOG_DEBUG, 0, '_paypal');
+
 
 llxHeaderPaypal($langs->trans("PaymentForm"));