Either spouse can request the license using one’s TaxisNet or e-banking codes to fill out the application online (https://www.gov.gr/ipiresies/oikogeneia/gamos-sumbiose/adeia-politikou-gamou), pay a fee and submit it.
Prospective newlyweds should also seek to find the list of municipalities that have joined gov. gr at https://aitiseis-dhmoi.services.gov.gr/dhmoi/