diff --git a/platformapi/mtpsapi/callback.go b/platformapi/mtpsapi/callback.go
index ab4fb4f2..bf9683f8 100644
--- a/platformapi/mtpsapi/callback.go
+++ b/platformapi/mtpsapi/callback.go
@@ -1,6 +1,7 @@
 package mtpsapi
 
 import (
+	"fmt"
 	"net/http"
 	"strings"
 
@@ -64,6 +65,7 @@ func (a *API) CheckCallbackValidation(request *http.Request) (callbackResponse *
 	err := request.ParseForm()
 	if err == nil {
 		sign := a.signParams(request.PostForm)
+		fmt.Println("testCheckCallbackValidation", utils.Format4Output(request, false))
 		if sign != request.FormValue(signKey) {
 			baseapi.SugarLogger.Infof("Signature is not ok, mine:%v, get:%v", sign, request.FormValue(signKey))
 			return SignatureIsNotOk