Note: The DearEsq free 'ask a lawyer' site is offered as a free informational service to the public and is not intended as legal advice. Laws vary from state-to-state, and in addition every situation is unique, and relevant facts may not be known. The answer to the question posed below may not apply to in your state or to your situation. For legal advice in your state and your situation you should consult with an attorney in your state who is familiar with the rules and laws in your state.
“I just discovered thru DNA testing that my “Dad” isn’t my “Father”. My Dad signed my birth certificate and raised me, but I’m not sure if he did it knowing I wasn’t his. My Father is dead, and my Dad never adopted me. So, what is my last name? Is it the same as my Dad because he signed the birth certificate, or is it the same as my Father because I wasn’t adopted? I was born in MA in 1960.”
Your last name is whatever is on your birth certificate, however if you wish to change it you should be able to easily do so through either your motor vehicle department, or your local courts, depending on in what state you currently reside.
