Certain Contracts must be in writing to be enforceable. This provides written evidence of the contract rather than opinions of parole evidence. Ks that can t be performed in 1 year, agency and Suretyship agreements. This is being done more and more via e-mail. The instructions would tell the signing party that by doing so, they are showing their intent to sign the contract.
Hash codes are another way of authenticating a document.
A person can determine if a message has been changed by comparing the hash code sent with the message to the hash code of the message actually received. UCC also recognizes Implied Warranties. Implied Warranties may be disclaimed the disclaimer must be conspicuous. Conspicuousness on-line is difficult to do. One electronic contract we all have agreed to is between the ISP and ourselves.