My mom says Go Go Nihon doesn't need my passport and that they're a scam?

[黒悪魔]

I'm trying to go to a language school in Japan. I asked if I could get a copy of my passport t email to them since it says they need it in the e-mail. She says the whole website/service is a scam,"they don't need the passport only the airport would, la la la talking ****", while I try to explain to her it isn't she of course doesn't listen. Is there anyone with experience or knows someone with experience with go go nihon or immigration to another country? It'd be really helpful.