A person who cannot sign his or her name because of illiteracy or a physical disability may instead use a mark – an “X” for example – as a signature, as long as there are witnesses to the making of the mark.
For a signature by mark to be notarized, there must be two disinterested witnesses to the making of the mark. Both witnesses should also sign the document, and one witness should write out the marker’s name beside the mark. These two witnesses should be in addition to the notary. It is recommended that a mark also be affixed in the Notary’s journal, and that the witnesses also sign the journal.
The “marker” must also be positively identified, as must any other signer including the witnesses.
As stated in a previous post, a person with a disability who is unable to hold or grip a pen can request that the notary sign for him/her.