Complete the application on the Certificate of Residency website. 2. Two (2) forms of proof of address must accompany your application.Have your landlord or other professional person who knows you and your family complete this form verifying your residency and household composition. 1. Suffolk county asks for proof of residence in the form of a utility bill, tax bill, or voter registration card. Gov or submit in-person at the NYC Comptroller's Office. NYDocSubmit is an app for mobile devices and is available for download in the Apple App Store and Google Play Store. Step 1: Complete the taxpayer information section. Submit the affidavit to your county with two (2) of the following documents as proof of residency.