I'm working on a web application that uses a pop-up to display the window where the users input their credit card details and pay. This, of course, is preventing MANY users from doing do so because of automatic pop-up blocking from most browsers. Cart abandonment is pretty big.
No, the pop-up isn't necesary and the whole company is well aware of the problems it causes, but right now there's nothing we can do to go around it. I'd explain why (tech limitations and "strategic" alliances with financial services providers) but it's beyond the point. We just have to use the pop-up right now...
Our client base is pretty old and/or not very tech savvy, so this makes the problem even worse. I'm strugglind to find an effective way of showing them how to allow pop ups, besides a video tutorial.
Can you think of any good examples or practices to deal with the problem, UX-wise?