How To Prove Sibling Relationships Through DNA Testing
The USCIS no longer considers DNA test results for siblings to prove the biological relationship.
USCIS Policy On DNA Testing for SiblingsThe USCIS changed its policy regarding it use of DNA test results for Sibling cases, where both siblings share a common parent. Under the current policy, based upon current scientific standards, the USCIS will no longer consider DNA test results for siblings to prove the biological relationship. The reason is that the DNA testing industry has not established reliable probability standards for sibling-to-sibling DNA test results, so the resulting test results can't be relied upon for accuracy.
Siblings Who Share Only One Common ParentThis is important because in sibling sponsorship cases, where a brother or sister is sponsoring his or her sibling, and the siblings only share one common parent, it has historically been difficult for the USCIS to determine whether or not a real biological relationship exists between the siblings. In the past, DNA tests were used, but were not entirely accurate. As a result, many sibling cases may have been denied based up faulty DNA test results. Under the currnet policy, the USCIS can consider DNA tests between the siblings and their common parent, since those tests have proven to be accurate. So for instance, if a U.S. Citizen sister sponsors her brother, who had the same father, but not the same mother, the U.S. Citizen and her father could have their DNA testing done and the brother and his father could likewise have their DNA test done.