As always there are rules to electronic documents. There are several documents that cannot be written nor signed electronically. They are:

                                                                                                                           

Work Cited

Use of Electronic Signatures and Contracts.  http://smallbusiness.findlaw.com/business-operations/small-business-internet/internet-electronic-signatures%281%29.html

Navigation

Importance of E-Documents and E-Signatures 

Electronic Document & Electronic Signatures

Examples of E-Signatures

Documents that CANNOT be written or signed electronically 

International & Long Distance Transactions

Relevant Cases

Electronic Signatures in Global and National Commerce Act