UK Citizenship Practice Test 2025 - Free Citizenship Practice Questions and Study Guide

The social security card would be least useful in proving identity for a National Insurance number because it is not a document commonly recognized in the context of UK identity verification. National Insurance numbers are specific to the UK, and the processes for obtaining them require proof of identification that aligns with UK standards.

In contrast, a bank statement, driver's license, and employee ID card are all documents that can provide verified personal details, such as name, address, and sometimes photograph, which are necessary to prove identity in the UK. A bank statement shows financial transactions tied to an individual, a driver's license serves as a government-issued form of ID with a photo and personal information, and an employee ID card often bears the employer's logo and contains identifying details about the employee. These documents are useful in official contexts for confirming one's identity in relation to obtaining a National Insurance number.