Immigration DNA testing becomes necessary when documentary evidence alone is insufficient to prove biological relationships in immigration applications. This scientific method is often required by immigration authorities to establish a clear genetic link between family members seeking reunification or when applying for visas, citizenship, or permanent residency. Whether it's validating the relationship between parents and children, siblings, or other close relatives, DNA testing provides irrefutable evidence, ensuring that applications meet the stringent criteria set by immigration laws and policies. In these critical situations, DNA testing acts as a pivotal tool, smoothing the path toward successful immigration outcomes.