Posted by Jacob Moon, Google Checkout Team If you want to implement the Notification API or if you want to perform Merchant Calculations for tax and shipping, Google Checkout requires a valid SSL certificate installed on your server. Until now, we've been accepting SSL certificates issued by a limited number of SSL Certificate Authorities )CA(. However, we've added 50 additional root CAs to our list, so you can easily find a suitable SSL certificate for your callback handler.

Posted by Jacob Moon, Google Checkout Team As the developer knowledge base and developer community for Google Checkout continue to grow, we're seeing a number of helpful resources and materials scattered across various places, which can make it difficult for you to find what you need. To help keep things organized, we've started to collect bookmarks for links to resources and materials of benefit to merchants in the process of integrating with Google Checkout.

Posted by Jacob Moon, Google Checkout Team Every synchronous and asynchronous message generated by Google Checkout includes an attribute called serial-number in the root element as shown here: <request-received xmlns="http://checkout.google.com/schema/2" serial-number ="58ea39d3-025b-4d52-a697-418f0be74bf9"/> <new-order-notification xmlns="http://checkout.google.

Posted by: Jacob Moon, Google Checkout Team If you have implemented the Notification API to receive notifications via your API callback handler, we want to let you know that we have shortened the notification retry period from 30 days to 14 days. This means that Google Checkout will attempt to deliver the same notification message to your API callback URL until your system responds to the notification properly, or until 14 days have elapsed.

Posted by Jacob Moon, Google Checkout Team Did you know that you can include any of the XML API tags in the HTML API? Our Help Center article shows you three simple rules to enable you to translate any XML element to an HTML parameter, and some examples to get you started. Feel free to comment on this technique or post your questions on this thread .