Sounds like they need a birth certificate or visa.
I moved to Georgia from Oklahoma several years ago. I've lived in Oklahoma all my life (Sooner born, Sooner bred, etc), but I married a Georgia lady, and we decided to live in Georgia.
I had a valid Oklahoma drivers license, but when I went to get a Georgia license, they required a certified birth certificate. And they weren't fooling around.
And I thought, "Good for them".
Neither proves your legally in the country.