Hello!
To purchase insurance for your item, just go to your Sales tab and find the "All Transactions" link (under the Manage heading.) Find the transaction you want to purchase insurance for and click the "Add Insurance" link to the right of the item.
Our Help page also has details on how to purchase our insurance automatically or on an as-need basis: http://www.auctiva.com/help/#a...nce-without-checkout
Hope that answers your question!
Rebecca