In order to welcome short-term guests to a vacation rental property in Greece you must register your property on the Short-Term Residence Register and obtain an AMA registration number or MHTE number (for EOT licences).
Short-term rental owners can obtain a Property Registry Number by registering online and providing proof of ownership. Vacation rental owners in Greece who do not declare their properties to the AADE (Independent Authority for Public Revenue) and obtain a registration number can face large fines. You must add this information to your TravelNest account in order to list your property on the booking channels.
Different regions may have different standards, so we recommend checking with your local authority. You can read the Airbnb guide of full hosting standards in Greece here.