An american company would like to hire me to do some freelance work. Can they pay me even if I am not a US citizen or resident or having a US work visa?

If yes can they just pay and hire me if I am working from abroad or can they also pay me if I am in the US and they would pay me to my Swiss account? I still have my Swiss address and I am just in the US for some months and will return soon and would like to work for them abroad. I am not sure if the company is allowed to pay me on my Bank Account in my country if I dont have a US work visa. Please help!