When a service or government agency asks you to "verify your identity," they are performing a process to confirm that you are exactly who you claim to be. In 2026, this usually involves a two-step digital process: first, you provide a "breathing document" like a passport or national ID card; second, you provide a "biometric check," such as a live selfie or a fingerprint scan. The system then uses AI to compare the face in the selfie to the photo on the ID to ensure they match and that the ID is not a counterfeit. This is essential in travel to prevent "identity fraud" and to comply with KYC (Know Your Customer) regulations in banking and high-security services. It essentially means that a "claim" (e.g., "I am John Doe") is being cross-referenced against a "trusted source" (e.g., a government database). If you are asked to do this via a mobile app, it often includes "liveness detection," where you might be asked to blink or turn your head to prove you are a real person and not just holding up a photo.