diff --git a/core/service.go b/core/service.go
index 1c2553f..439c556 100644
--- a/core/service.go
+++ b/core/service.go
@@ -344,11 +344,16 @@ func (sh *serviceDescription) link(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	_, err = sh.readProfile(oldType, oldId, bfinfo)
-	if err != nil {
-		logger.Error("readProfile(old) failed :", err)
-		w.WriteHeader(http.StatusBadRequest)
-		return
+	guestlink := (len(oldType) == 0)
+	if !guestlink {
+		_, err = sh.readProfile(oldType, oldId, bfinfo)
+		if err != nil {
+			logger.Error("readProfile(old) failed :", err)
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+	} else {
+		logger.Println("from guest acc to real acc link : ", oldId, bfinfo, newType, newId, bfinfo)
 	}
 
 	email, err := sh.readProfile(newType, newId, bfinfo)