Yes, a sibling DNA test can indeed establish whether half-siblings share a biological father.
The whole question
Can I use a DNA test with my half-sisters to prove that I am my late South African father’s daughter so that I can apply for citizenship? If so. how would I go about it? Can you recommend third parties that could assist with the process?
The long answer
A sibling DNA test can indeed establish whether half-siblings share either a biological mother or father. In your case, the DNA tests can show whether there is a shared biological father.
The firms that offer DNA testing make a distinction between testing for your own peace of mind and legal testing.
An article on DNA test prices by Money Today says that DNA testing for legal purposes costs about R4,700. Importantly, they also say that “They are usually done using a chain of custody in conjunction with the department or agency that requires the tests to be done. Failure to meet this requirement may make the test inadmissible to the department or agency.”
Legal DNA Testing says that the chain of custody “… is simply put, a sample collection procedure that must follow certain steps. The procedure will ensure the integrity of the results, that no mistakes are made in the sample collection and that the results reflect the true relationship between alleged father and child.”
So, whatever company you ended up using would have to meet the DHA’s chain of custody requirements, and it is something you would need to make sure about with the company from the start.
Home Affairs says that you should visit their offices
If you run into difficulties with Home Affairs, you could consult one of the following organisations that have a lot of experience in dealing with Home Affair
How can we help you , please email us to info@samigration.com or whatsapp message me on: +27 82 373 8415, where are you now? check our website : www.samigration.com