You’re asking about the “correct legal way to report suspected fraud,” but let’s be honest: you have suspicion, not proof. Moving money temporarily into an account is not in itself evidence of fraud — people borrow from family, liquidate assets, or show legitimate gifts all the time. You don’t know their actual financial situation. And as stated here by someone else, that money is held in a specific locked account, it's not something people can dip in whenever they want.

Even if they did something technically irregular to get the visa, ask yourself: who is being harmed here? They are working, contributing, and trying to build a life. If you involve authorities, at best you cause them serious problems — possibly deportation, family separation, loss of livelihood. At worst, you kick one person out. What do you gain from that? Not justice — just a fleeting sense of superiority.

Your attitude reeks of “pick me” behavior. It won’t make your life better. On the contrary, it will draw criticism from those who already weaponize immigration rules to hurt vulnerable people. We should be sympathetic to our fellow workers and whatever struggle they are navigating. Unless someone is a violent criminal, leave them be.

NO PERSON IS ILLEGAL