I have worked with several US & European companies as freelance / outsourced resource. Had to sign some documents confirming that I am not the resident of clients' countries. There were no issues whatsoever in payments or anything else.
Maybe it is your tax status that's causing the issue. Have you considered forming an LLC (or equivalent in your location) and applying through it?
Maybe it is your tax status that's causing the issue. Have you considered forming an LLC (or equivalent in your location) and applying through it?