You can get a certificate of locality from the family record where you have your regular registration.
The certificate is issued at a later date, by applying online to a KEP or to the Municipality in which you are a registered citizen.

You will need your personal Taxisnet credentials.

Once the certificate has been issued by the KEP/Municipality, it will be sent to your Inbox and you will be notified by e-mail and sms. For these cases, select "Application to a KEP / Municipality".

See if your Municipality has joined gov.gr.

Alternatively, you have the option to book an online appointment on myKEPlive so as to be served by an employee of the Citizens' Service Centres (KEP) via video conference.