How to Find Biological Father Without His Name

Our team of search angels has helped hundreds of people to find their birth parent(s). Over half of the requests we receive are people searching for their biological father. In this post, we want to help those who specifically want to know how to find their biological father without knowing his name.

Here are the ways we approach searches when the names are not known. Please read and consider all of them for your search. 

Our mantra for birth father searches

Our team has a mantra we use for birth father searches, “Paternity is always in question.” What this means is that we usually do not take any details provided as cold hard facts when it comes to determining and locating a birth father. In some cases, a birth mother may have been totally sober and aware at the time of conception, and had no other relations. But in many, or maybe even most, cases we work on their was frequently drugs and/or alcohol involved, as well as more than one possible sexual partner who could be the birth father. We never seek to offend, but the simple logistics of situation mean that the birth father only had to be present for a few moments. 

We don’t mean to offend, but we typically always approach birth father searches wanting concrete proof. The best concrete proof is typically DNA, or a paternity test.

Using DNA testing to find biological family

DNA testing, in many cases, is the only way that a biological father can be accurately be determined. The way it works is that a DNA test is submitted through a company, and then the DNA test results are matched to others in the database of that company. 

There are several companies that offer this service, but when you are getting started in your search we typically recommend AncestryDNA®. We recommend them for two reasons: 1) They have the largest database of people who have been tested (at the writing of this article, over 17 million). 2) They have the most advanced and user friendly tools for sorting, identifying and researching your matches. 

Our method for analyzing DNA result with Ancestry will not be outlined here, but we welcome you to reach out to us here, to get free help from our volunteer team to analyze your results. 


Request your original birth certificate

Depending on what US state you were born in, you may be able to request your original birth certificate. You can see a breakdown of each states laws at this link: 

State adoption legislation

This typically only works for those who were adopted, and in our experience only rarely does it have both the birth mother’s name and the birth father’s name. It’s one possibility, so we list it here. 

Using a search engine to locate and research

If you have your birth father’s name, or some pieces of information about him, you can use the internet to possibly locate him or additional information. We have a to part blog series about how to search online:



Using a background check system

In the previous section, we mentioned background checks. We just want to re-emphasize that it is worth doing to ensure you and your families safety before ever reaching out to anyone.

Additional resources

The content we have available is always growing! Be sure to review other areas of our blog and site to see if new information is available.