As headshot photographers, we all deal with this: a client needs a background matched down the road, and there's no good way to do it without hoping the original backdrop is still around and still set up exactly the same way. Over the years I've built a system around this that saves me the headache and makes the whole client experience smoother too.
It comes down to a couple of extra shots you're already in position to grab, on jobs you're already doing. Here's how I do it.