Can I use a pencil? No, you cannot use a pencil. Ink is required. A blue pen is used for signing all documents. This helps identify which is the original document. Updated on November 3, 2018 Was this article helpful? Yes No Related Articles Why are square brackets and a “c/o” used in my (and my Witnesses’) addresses? Who can be my two witnesses, and what will they do? What if there is a typo or error on my document? Why are notaries not available in Canada? Where do I find a Notary Public? If I use a Notary Public, do they need to stamp my documents?