Resources and Forms. RESOURCES. Witness my hand and official seal.(notary signature). (seal) This article and video will show Notaries to fill out each part of a notarial certificate, and common mistakes to avoid. If the signer has previously signed the document, use Acknowledgment language. The notary must require the signer to present satisfactory documentary evidence and administer an oath or affirmation. Credible Witness Acknowledgment. Our Utah Notary Acknowledgment Stamp is the perfect way to add the required wording to a document to make it Utah compliant. Our Utah Notary Acknowledgment Stamp is the perfect way to add the required wording to a document to make it Utah compliant. On this ______day of ______, in the year 20______, personally appeared before me date month year.