The company cheats by being a tightwad and by conducting an online interview (which have always been prone to cheating or embellishing, and companies perfectly know it) and the candidate cheats by using this opportunity.
I can't stop repeating it, just invite the candidate to your office. That's it, that's how simple the problem is solved.
Just in case anyone else in the audience is curious, this is what self-justification of egregiously bad behavior looks like.
If you can't be trusted to work remotely, absolutely stick to in-person roles. If you think your coworkers are any less deserving of your respect and candor because they aren't in the same room as you, you definitely aren't qualified to work remotely.
I can't stop repeating it, just invite the candidate to your office. That's it, that's how simple the problem is solved.