My dad left Poland in the late 80s with my Grandfather
My dad Poland in the late 80s. He was not 18 at the time and he fled with my Grandfather. Never renounced their citizenship and have been back multiple times. My Grandfather died in 2012.
I have some original Polish documents. Including my dads passport. I have seen it mentioned multiple times there is a form in Polish that someone like my dad can fill out?
What I do not understand is the process and how to do this. My dad is a US citizen now, I have my documents from here, and he has his, as well old Polish documents.
What do I do? Do I need to visit the consulte in person?