Which document is essential for proving eligibility for residence?

To prove eligibility for residence, a valid ID is crucial because it serves as an official form of identification that establishes a person's identity and often their legal status. This document is essential in various processes, including applications for residency, as it confirms the individual's name, age, and sometimes nationality or immigrant status, depending on the laws and requirements of the specific jurisdiction.

While proof of income, health certification, and proof of education can be important in different contexts—such as demonstrating financial stability, health compliance, or educational qualifications—they do not primarily address the fundamental requirement of establishing identity. Valid identification is a foundational element required in legal and administrative processes related to residence, making it the most essential document in this scenario.