A hard copy signature is a physical, handwritten signature used for official business documents. This type of signature is seen as the most reliable and legal form of authentication as it requires the signer to physically provide their mark in pen or ink. It provides an indisputable traceable record that the document was signed by the person in question, which could be very useful if the document needs to be challenged in court at a later date. Besides providing assurance of authenticity, it may also serve as a reminder that a contract must be abided by.