> Credit score. As a foreigner, you won't have one. And can't rent an apartment, buy a car, or get a mortgage. Many companies run a credit check as part of the pre-hire background check.
I'm curious. Isn't enough to show your latest payroll? Or, if it's is your very first month, your contract stating how much you'll earn. In Europe there are credit rating companies, but relying on payrolls are a thing as well.