How to Find a Biological Father without his Name


Searching for a birth father? Read these tips on how to find a biological father without his name from an expert who helps adoptees and others find their birth parents.

Thank you to Troy Olson, the founder of, for writing this guest blog post.

Troy Olsen DiscoverFamilynet.png

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. 

How to find a biological father without his name

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 or evidence provided as 100 percent accurate 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 sexual relations. But in many or most cases we work on there was frequently drugs and/or alcohol involved, as well as more than one possible sexual partner who could be the birth father. The simple logistics of the situation mean that the birth father only had to be present for a few moments. We have worked on many cases where the birth mother refuses to divulge, or simply doesn’t know.

We don’t mean to offend, but we typically approach birth father searches needing concrete evidence. The most concrete evidence available is a DNA test or a paternity test.

Use DNA testing to find biological family

DNA testing, in many cases, is the only way that a biological father can be accurately determined. The way this works is that the searcher submits a DNA test through a company and the DNA test results are matched to others in the database of that company who have also completed the test, and share common DNA with the searcher.

AncestryDNA test kit.jpg

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 18 million). 2) They have the most advanced and user-friendly tools for sorting, identifying, and researching your matches. 

Birth roots thumbnail.jpg

You can learn a lot from your DNA about your birth roots even if you aren’t quite ready to have contact with your biological relatives. Learn more in a free downloadable guide from Your DNA Guide, which also has a table to help you understand the likelihood of being able to identify a birth parent with your current test results.

Get free guide: 3 Things DNA Can Tell You about Your Birth Roots

Request your original birth certificate

Depending on what US state you were born in, you may be able to request your original birth certificate. See a breakdown of the laws of each state.

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

Use 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. Read more in a two-part blog series about how to search online for a birth parent if you know their name.

Use a background check system

In this information age, it’s possible and even advisable to get a background check on any birth relatives.  You want to ensure your own safety and that of your family before ever reaching out to anyone. Many services provide background checks. Our team at has tested many different systems and the largest and best we have found is

Get expert help finding your birth father

Searching for a birth father can be a difficult and lonely process. Expert help is available! I’m part of We provide free help finding birth parents. Diahan Southard here at Your DNA Guide teaches you how to build your family tree using your DNA so you can learn more about your heritage (whether on your mother’s side or your biological father’s side).

Troy Olsen DiscoverFamilynet.png

Reach out to to get free help from Troy’s volunteer team of search angels.

headshot 2020 with logo cropped.jpg

Read 4 steps to discovering your birth roots, and more do-it-yourself resources from Your DNA Guide that can help you in your search.


Source: Your DNA Guide Blog – Your DNA Guide

Posted On: April 8, 2021 at 07:48AM