diff --git a/unify/pay_type.go b/unify/pay_type.go
index 5f6ead2..a99e77f 100644
--- a/unify/pay_type.go
+++ b/unify/pay_type.go
@@ -71,9 +71,6 @@ func (r *TransferReq) Check() error {
 	if r.PayTitle == "" {
 		return errors.New("PayTitle is nil")
 	}
-	if r.PayChannel == "" {
-		return errors.New("PayChannel is nil")
-	}
 	if r.PayType == "" {
 		return errors.New("PayType is nil")
 	}