Please be aware of the timelines for making these changes.
August 2009: the Test Environment will begin to enforce our list of permitted HTML tags so you can test payment pages before setting them live.
September 23rd 2009: we will activate our list of permitted HTML tags for all live payment pages for all customers. At this point any visual impairment to the design of your payment pages caused by the measures we are taking to prevent cross site scripting will be visible to your shoppers. If this causes an issue for your payment pages you can remove the list from your installation via our Merchant Interface(see Disabling and Re enabling Whitelist in Technical Notes below) up until the
14th October 2009 from when all installations will work with the list of permitted HTML tags without exception.
We will update you with further details nearer the time letting you know when to start reviewing your payment pages in the Test and Production environment.
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