No.
Only a notary public can sign. Often Lawyers are also Notary Publics as well.
If the signer had to sign in front of a notary, so does the co-signer.
Notary sign
Yes.
only if the notary has no gainful interest in the document they are notarizing.
In Indiana, a notary typically signs on the title in the designated notary section, which is usually located near the signatures of the buyers and sellers. The notary will also provide their seal and indicate the date of notarization. It's important for the notary to ensure that all parties sign in their presence to validate the transaction.
There is no requirement for an attorney to sign a will. It has to be witnessed and may require a notary.
The function of a Notary is to provide confirmation that a signature is in fact the signature of the person claiming to have signed a document. A Notary cannot sign for anyone in the sense of signing a document instead of someone else.
If the notary forgot to sign, the document is not notarized.
Not unless he is a registered notary public.
It depends on what you're asking. I suspect you mean, "How do you get a document notarized?" If so, you take the document to a Notary Public, sign the document in front of the Notary, and show ID. The Notary will stamp, date, and sign the document. You can usually find a Notary at a local bank. A Notary will normally charge you a small fee.
You stamp it with your little Notary stamp, and then you sign your name under it.