diff --git a/alipay/utils/cert.go b/alipay/utils/cert.go
index 2b6fe4d..279c7e9 100644
--- a/alipay/utils/cert.go
+++ b/alipay/utils/cert.go
@@ -43,7 +43,7 @@ func GetCert(mchCertPath, rootCertPath, PublicKeyPath, appId string) (*CertConfi
 	}
 	c := getCertConfig(appId)
 	if c != nil {
-		return nil, fmt.Errorf("appId %s already exists", appId)
+		return c, nil
 	}
 	mchCertSN, err := getMchCertSN(mchCertPath)
 	if err != nil {