Well, someone in your field of work should know how to make security a top priority because if, by mistake, anything leads to your security being compromised, it can cause losses not only to you but also to others. My brother also had a similar experience where he was asked to submit some country IDs, a resident permit, and a utility bill before he could be accepted to work just as a telegram moderator, but he was wise enough not to submit those documents, and later it was discovered that those guys were just scammers. Who knows what they were going to use those IDs for? Everyone who is just into any online-related work or investment really needs to take their security seriously; otherwise, it can ruin their reputation, depending on what the case is, or cause them to lose their assets.
No matter the nature of the work security is supposed to be taken seriously, one thing have noticed with things about security is that any were there is money scams are always not far from It, and they keep creating new strategies of taking advantage of people, from your brothers experience they don only ask for money again but documents of such value, and they will try anything possible just to earn trust, scammers are taking over telegram that's how I got a message from an unknown user telling me he got a slot to win a game, did not even ask questions immediately blocked the user, we need to be careful some people are careless to even send there nude, blackmail is real we all should be careful out there so we don't become victims of scammers.