Ordering a death certificate 1964, why does it ask the full name of their parents?

I have my grandparents death certificates and it doesnt mention anything about their parents.

so why is the GRO site asking?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).