Complete this online application and submit it, along with an uploaded signature page and uploaded proof of qualifying employment to the SLCo Recorder. The fee is paid online.This webpage contains the form to fill out to document that event, instructions for filing, and answers to frequently asked questions about oaths of office. ✓ All documents provided to the division will be imaged and stored in a secure database and will be returned to the applicant. ✓ Applicants 21 or over may. Application for a Certificate of Address – A Certificate of Address is required for all new primary structure construction projects. No, retired gazetted officers can't sign or attest a certificate. The following forms can be downloaded and printed for your convenience. The purpose of this policy is to adopt and apply standards and definitions in the addressing of streets and properties in the county. The general number for Engineering is 801-535-6248.