Schools, employers, banks and courts in Turkey often ask for a residence certificate (yerleşim yeri or ikametgâh belgesi) as proof of address. You can get it free of charge and with a verification barcode through the e-Devlet service of the General Directorate of Population and Citizenship Affairs (NVİ), without going to a registry office.
According to NVİ, a certificate obtained from e-Devlet has the same legal value as one issued at a registry office, with no wet signature or stamp needed. It shows only the current address in your population record, so if you have moved you need to register your new address first.