Electronic Signatures Requirements

The whole area of electronic signatures makes confused most of organizations. People doubt that anything that looks like a signature on an electronic document is legal. Practically for using legal electronic signatures you must always sign documents by using appropriate software — the same requirement that is necessary for pen and paper signing.
Other requirements for both electronic and paper signing
1. Electronic signatures must be unique to the individual.
2. Electronic signatures must be verifiable as belonging to a person.
3. Electronic signatures must be under the sole control of the person signing (i.e., you cannot force someone to sign a document under duress).
4. Electronic signatures must be applied with intent.