Location: Colorado. So the name on my birth certificate where the father’s name goes is a random guy my mom had a fling with right before she found out she was pregnant with me. I’ve never met him, she hasnt spoken to him since, but his name has been on it for over 30 years and I want to get it taken off. I’ve also met my real father and hes part of my life now but I was told I would have to take his last name if I put him on my birth certificate, which I dont want to do because i love my last name. How do I go about taking the other guy off and putting my dad on?