> For the complete documentation index, see [llms.txt](https://lianlianpay.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lianlianpay.gitbook.io/docs/online-banking-payment/sync-notification.md).

# Synchronous Notification

Lianlian will send synchronous notification to the `url_return` which is send in payment request after the payment is confirmed as successful.

Characteristics:

* Lianlian wouldn't send any synchronous notification if the payment is failed or abnormal.
* Synchronous notification sends only once.In extreme cases, if your user turns off the payment page without redirecting to `url_return`, the synchronization notification wouldn't send out.

We recommend you to use [asynchronous notification](broken://pages/-LJrJqz9PljPm0kUuwwv)；

> Some banks, such as ICBC, do not support redirection to `url_return`. In this particular case, there will be no synchronous notification.

## Request Parameters and sample

Payment synchronous notification, a HTTP POST request in a form format, will be sent to `url_return` whenever the payment is confirmed as successful.

### Request Parameters

### Sample Request

```markup
<form action="${url_return}" method="post"> 
    <input type="text" name="oid_partner" value="201304121000001004">
    <input type="text" name="sign_type" value="">
    <input type="text" name="sign" value="4a1123e3f123138df813ab81de8">
    <input type="text" name="dt_order" value="20130224120224">
    <input type="text" name="no_order" value="2013099129111111">
    <input type="text" name="oid_paybill" value="2013099129232322">
    <input type="text" name="money_order" value="0.01">
    <input type="text" name="result_pay" value="SUCCESS">
    <input type="text" name="settle_date" value="20140109">
    <input type="text" name="info_order" value="Remarks">
    <input type="text" name="pay_type" value="1">
    <input type="text" name="bank_code" value="01020000">
</form>
```