Abstract: A system facilitates authentication in situations where a pop-up window fails or is disallowed. If a browser application accessing a first webpage is not capable of presenting pop-up windows and redirects a user to a separate webpage for collecting information, the browser application, the absence of a JavaScript object indicating the pop-up window, or the inability to exchange data with a computing device associated with the first webpage is determined. In such a case, if valid information is received from the user, authorization data is provided to the computing device in the form of text included in a Uniform Resource Identifier (URI) for the first webpage. As a result, transactions may be authorized when a browser application is not capable of presenting pop-up windows.