A method, and associated system and computer program product, of validating site data. The method includes the steps of, in a processing system 200, receiving 100 an indication of site data, performing a comparison 110 of the indication to site data criteria, and validating or invalidating 120 the indication based on a result of the comparison. The indication of site data could be at least part of a webpage, a link to a webpage, a Uniform Resource Locator, an IP address, at least part of an AJAX page, and/or at least part of a document.