Don't you have to ask for ID at the end anyway? So the only question is avoiding behavior that makes it look like you're a fake job listing harvesting PII or so

Don't you have to ask for ID at the end anyway? So the only question is avoiding behavior that makes it look like you're a fake job listing harvesting PII or something. Is the issue skilled candidates that are misrepresenting where they live, unqualified candidates with fake resumes trying to land the position anyway, or something else? What have you tried? If they trip enough red flags and it's an international issue, you could just be up front that you're suspicious (including why) and ask them to go outside and take a video of themselves in front of wherever they live. Then you check it against street view, scrutinize the vegetation, that sort of thing. Require the rest of the interview process to be via video call with a wide view of the room to ensure it's the same person. That solution is respectful of their time since it's quick and easy for them. They also presumably already shared their address with you so it's not particularly invasive.