As a Colorado Notary, am I allowed to sign documents with a signature stamp? — J.D., Colorado No, the Colorado Notary Public Act does not explicitly permit Notaries to use a signature stamp, and it implies that the Notary’s official signature must be handwritten on a paper document. (See CRS 12-55-112[4.5].) Hotline answers are based on the laws in the state where the question originated and may not reflect the laws of other states. If in doubt, always refer to your own state statutes. – The Editors Confronted with a tricky notarization? Unsure how to proceed? NNA members have unlimited access to our expertly trained NNA Hotline counselors to help you with all of your notarial questions. Call 1-888-876-0827, Monday through Friday, 5 a.m. to 7 p.m. PST; Saturday, 5 a.m. to 5 p.m. PST.