Fake job seekers are flooding US companies that are hiring for remote positions

Another remote employment fraud that is much more prevalent is "Overemployment". You will get an applicant that is very skilled and hits the interview out of the park. But then when hired they are working many jobs and just trying to steal as many paychecks as they can until you fire them. They keep their first jobs resume clean and they all check out.

There is a Reddit community with over 400k members to show how prevalent this is [1]. There's lots of tactics like not allowing mentions on LinkedIn so they can't be publicly mentioned and seen by other unsuspecting employers, and just maintaining plausible deniability about why they can't make an on camera meeting. It is technically not illegal so it is very lucrative and hard to detect.

https://www.reddit.com/r/overemployed/top/

i am wondering, how would that even work for any subsequent jobs, past the first set of multiple jobs done at once?

A pre-employment background check (which you typically do after accepting an offer and right before starting the job) would clearly show all your previous places of employment (for up to 7 years at the very least), along with the timelines. How would one explain that to the employer?

What kind of background check would reveal all previous employers? Where I’m from a background check usually consists of checking one or two (candidate provided) references and possibly googling their name for red flags.