Hello , i would like to know if it's possible to pass an extra variable to Google Checkout.. that i can get back after the person check-out and pay. Hi Bidders, This is repost of my old project. I need the Google Checkout PHP script, through which i can send an extra veriable (passing through form --> text-box) to Google and rceive that variable after checkout. Here is the following Code i'm using :: ----------------------------------------------- <form method="POST" action="https://checkout.google.com/api/checkout/v2/checkoutForm/Merchant/1234567890" accept-charset="utf-8"> <input type="hidden" name="item_name_1" value="Buy product"/> <input type="hidden" name="item_description_1" value="online product sale"/> <input type="hidden" name="item_quantity_1" value="1"/> <input type="hidden" name="item_price_1" value="<?=$amount_to_pay?>"/> <input type="hidden" name="item_currency_1" value="USD"/> <input type="hidden" name="ship_method_name_1" value="None"/> <input type="hidden" name="ship_method_price_1" value="0.00"/> <input type="hidden" name="tax_rate" value="0.00"/> <input type="hidden" name="tax_us_state" value="NY"/> <input type="hidden" name="_charset_"/> <input type="image" name="Google Checkout" alt="Fast checkout through Google" src="http://checkout.google.com/buttons/checkout.gif?merchant_id=1234567890&w=180&h=46&style=white&variant=text&loc=en_US" height="46" width="180"/> </form> --------------------------------------------- Now my question is .. 1. How to integrate return URL ? 2. what is "_charset_" ? 3. And how I can send extra veriable (suppose XYZ123) through this code? And also I want to receive that variable after google checkout. 4. I need respondHandler to know the payment status.