Even if it was a sponsorship, I find it strange that you can’t have copies of the immigration docs so that you can at least explain to immigration what’s going

Even if it was a sponsorship, I find it strange that you can’t have copies of the immigration docs so that you can at least explain to immigration what’s going on. I’d imagine there is case number or something that you could keep? Otherwise what happens? You can’t even explain or prove your current situation? Seems draconian.