sIf you make someone elses signature with their prior approval, it is generally called a Power of Attorney. If you make someone elses signature without their consent it is called forgery, or fraud.
fraud
Fraud is a crime of deception, you pretend to be something you are not....eg copying someone's signature on a document. Corruption relates to taking advantage of your position of authority - taking money to do something for someone (or as a favour to a friend or relative ) AND paying someone in authority to do something for you.
Yes, if you hold a valid power of attorney to act on their behalf. Otherwise no. Signing for someone you do not hold power of attorney for is fraud, and against the law.
Signature forgery is considered fraud. It is doubtful that you have a valid contract.
If someone forged a signature on a quitclaim deed, they have committed fraud. The forged deed may be invalid and the rightful property owner can take legal action to have the deed invalidated and the property returned. It is important to consult with a lawyer to determine the best course of action.
No, but fraud isn't an impossibility.
Replicating a signature is less a copyright issue and more a fraud issue.
No, it is not illegal to change your signature as long as you are not doing it with fraudulent intent. It is common for people to update or modify their signatures over time.
Fraud would be the charge in court.
If the person who witnesses a signature is not present at the time of signing then the contract is no longer a legally binding document.
A forged signature on a contract for a car is considered fraud, you should contact an attorney for this situation.