How is signature for collaborative agreement verified?

I live outside the uk and want to make a collaborative agreement with a person living in the uk. What is the procedure of verifying / validating signature or agreement?

how to setup vpn on ipad

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…).