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3.0 Form Integration in Detail
Step 1: The customer orders from your site
A payment begins with the customer ordering goods or services from your website. This process can
be as simple as selecting an item from a drop down list, or can involve a large shopping basket
containing multiple items with discounts and delivery charges. Your interaction with your customer is
entirely up to you and Form integration requires you to collect only a few compulsory pieces of
information, which are detailed in the latter part of this guide.
It is generally a good idea to identify the customer by name, email address, delivery and billing
address and telephone number. It is also helpful to have your server record the IP Address from
which the user is accessing your system. You should store these details in your session alongside
details of the customer’s basket contents or other ordered goods.
You do not need to collect payment data, all your site needs to do is calculate the total cost of the
order in whatever currency your site operates and present the user with a confirmation page,
containing the transaction detail in an encrypted hidden field (see Step 2).
If you wish to apply a surcharge to a particular payment method/currency then this will be applied and
shown on the subsequent payment pages.
Sage Pay Form Integration and Protocol and Guidelines 3.00 Page 9 of 61