A button with a payment form is the easiest way to organize online purchases. The merchant can place such a button in any convenient place on its website. By clicking on the button with the payment form, the buyer automatically passes to the payment page.
In the part of the Internet-shop web site designated for order placement, the enterprise should create an HTML-form that redirects the customer to IPS Assist server and send the payment parameters. Specify the method (POST) and the action for the sent data processing (in UTF-8 coding) in <FORM> element attributes:
<FORM METHOD="POST" ACTION="URL of the server request">
</FORM>
The pairs (NAME/VALUE) should be transmitted in the request form for all the set payment parameters. For example, the field with the enterprise’s identifier in IPS Assist will look as follows: