Well yes because my mom signed a contract and stuff like that and the answer is yes
What is the nature of the persons incapacitation
nope, there should be a signature of the other person. he/she can sue you if he knows it. then the person paid you can sue you too if he knows that the signature of the other owner wasn't there because the payment can be forfeited.
A person's signature that begins with "auto" could refer to an automated signature generated by a digital tool or software that mimics a handwritten signature. This type of signature is often used for convenience in electronic documents. However, it's important to ensure that such signatures are legally recognized and comply with relevant regulations, as they may differ from traditional handwritten signatures in terms of authenticity and validity.
you can go to a famous person and get their autograph, or buy an authorized autograph from a store.
you can have the real person sign their signature and compare it to the one you think got forged or ask the person who had their signature written down if they recall signing it.
A signature written by hand by the person in question.
Usually a persons signature
Nope. And you shouldn't--it's unethical if not illegal.
An account of somebody's life written by another person is called a biography.
It is either called simply a "signature" or, if it's a well-known person such as a movie star, singer, political leader, author, or royalty, it is often called an "autograph."
The abbreviation "pp" stands for "per procurationem," which means "by proxy" and is used when someone is signing on behalf of another person. It typically appears before the signature. For example, it would be written as "pp [Name of the person being represented] [Signature of the proxy]."
For people: Only if you have legal power of attorney for that person. For businesses: Only if you are officialy authorized by your company to sign on said persons behalf.