I have just returned from speaking at an international forum called eNotarisation, eApostilles and Digital Evidence.
The notarization of documents is a function dating back a few centuries which facilities the production of a copy of a document without producing the original. In some instances, the notary can even attest to the execution of the document.
Around the world, many transactions require notarization, including the execution of property transactions, especially in the civil law countries. The volumes attested to by notaries amount to millions annually. This makes it an obvious candidate for executing this type of document online, by taking advantage of the various legislation passed around the world.
Here in Singapore, notarization is still old-school but do not be surprised if you're signing a document before a notary in some other country, he will whip out fingerprint scanner and digitally sign your document.