Originally Posted by
Synnen
I'm asking because we cannot help search for minors :)
I'm doubting your father gave up parental rights at the time--in the 60s, the woman's husband would have been determined to be the legal father regardless.
Your half sister may not even KNOW she is biologically not related to her father--are you willing to disrupt her life so that you can satisfy your curiosity?
If she DOES know she is biologically not related to the father that raised her, then she may also be searching. Your best bet is reunion websites such as adoption.org, adoption.com and ISRR.