What unique feature can be found on the bio-page and signature page of a passport?

The unique feature found on the bio-page and signature page of a passport is the micro print signature of the bearer. This micro printing is a security measure that adds an additional layer of protection against counterfeiting. The signature is created in such a small font that it is difficult to replicate without high-quality printing technology.

This feature not only helps to verify the authenticity of the passport but also ties the document directly to the individual by including their own signature, albeit in a form that is not easily visible to the naked eye. The use of micro print makes it challenging for counterfeiters to produce a duplicate that looks authentic.

While holographic images, hidden watermarks, and UV light patterns are indeed security features found in various parts of passports, they are not exclusive to the bio-page and signature page or do not specifically represent the signature of the bearer. The micro print signature serves as a reliable verification tool that is closely associated with the identity of the passport holder.