You have mentioned two types of documents in your question: a contract and a deed of donation. Every jurisdictions has its own laws regarding the proper execution of legal documents. It is not generally necessary for the "attorney" to sign unless she is the donor. The usual requirements require the signatures of the donor, witnesses and the signature of a notary who acknowledges that the document was signed by the donor.
You need to check the laws in your particular jurisdiction.
There is no requirement that an attorney sign a contract. It is a good idea to have an attorney review the agreement before signing it.
There is no requirement that an attorney sign a contract
No. This is forging a signature and is illegal.
No. A marriage license is a legal contract.
Yes. Without an 'original' signature how would anyone know whether it was sent with, or without, the purported writer's approval or input.
Without a signature, there is no contract. If you want your money back the dealer is obligated to give it to you.
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.
18 years of age.
If the client has engaged the attorney to defend him he HAS abbrogated to the attorney the right tomake ceertain decisions for him. If you don't like your attorney's handling of the case, fire him and hire another one.
No. If the lender requires a co-signer and that co-signer doesn't sign the note then the lender will not pay over the proceeds of the loan. Without the co-signer's signature the contract is not valid.
Simple answer is no.
Answer for US: Yes, the contract is void. Also, the act of forgery was a criminal act, and the individual who forged the document should be prosecuted.