The Greek parliament has adopted legislation (Law 4701/2020) which provides a number of incentives to businesses who decide to use e-invoicing through a service provider during the tax years of 2020-2022. These incentives for example include a reduction of the statute of limitation for fiscal matters by 2 years, and a depreciation of twice the amount of the cost incurred for acquiring the technical equipment and software required for the implementation of e-invoicing. According to the rules of the new framework, this requires that businesses notify the tax administration of the use of e-invoicing through a service provider as the exclusive method to issue, exchange and store invoices. In this case, businesses are not allowed to issue paper invoices, unless they revoke their statement.
The law is available in full here.