I have a paypal button as follows:

```
<form id="fmPaypal" method="post" action= "https://www.sandbox.paypal.com/cgi-bin/webscr">
        <input type="hidden" name="cmd" value="_xclick">
        <input type="hidden" name="currency_code" value="NZD">
        <input type="hidden" name="business" value="blah01@yahoo.com">
        <input type="hidden" name="item_name" value="Order">
        <input type="hidden" id="item_number" name="item_number" value="123">
        <input type="hidden" name="amount" value="0.01">
        <input type="hidden" name="no_shipping" value="1">
        <input type="hidden" name="return" value="http://www.blah.com/checkout/return.cfm" />
        <input type="hidden" name="cancel_return" value="http://www.blah.com/checkout/cancel" />
</form>

```

This works and users are redirected to paypal ready for payment.

But, should I expect to get some data returned from paypal via the return URL? e.g. results of the transaction? Or should I assume that the payment processed successfully if the user is redirected to the return url?

Tried getting this information from the docs without success.