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Gift Certificate Template for Microsoft Word: http://office.microsoft.com/en-us/templates/gift-certificate-TC010357047.aspx
Using the template referenced above, you could create a gift certificate for your store and then configure it to the gift certificate item as a digital download file, so that the customer could print it out and write the gift certificate code onto to to give the recipient a physical gift certificate (although they will really need is the code itself to use during the checkout process in order to redeem the gift certificate.
Tutorial: How to record an in-store usage of a gift certificate