Witnesses for Birth Certificate: If the person listed on the record is under 18 years of age, both parents of record MUST sign the affidavit. I declare under criminal penalty under the law of Utah that everything stated in this document is true.Use our Affidavit of Paternity form to acknowledge paternity for a child born outside of marriage. Applicant's Father: Name. Passport No. Date of Naturalization. Signature. If you're not finding the forms you need, contact us at or Click here to contact the web navigator. General affidavit form for use within the State of Utah. Modify this affidavit to meet your specific needs. Utah law allows you to submit your own affidavit. We offer templates to create affidavits online in Utah without prior experience.