Greece has not adopted national legislation based on or influenced by the United Nations Commission on International Trade Law (UNCITRAL) Model Law on Electronic Signatures.

Art. 46 of Law 4002/2011 requires that gambling sites operating in Greece have a ".gr" domain name.

The Consumer Rights Directive 2011/83/EU provides an updated framework aimed at encouraging online sales. The Directive has been implemented by Law 2251/1994 on the Protection of Consumers. The law contains provisions about terms of contract, distance selling, liability, and unfair trade practices, among other things.

The EU Directive on Audiovisual Media Services (AVMS) covers traditional broadcasting services as well as audiovisual media services provided on-demand, including via the Internet. Art. 13.1 provides for Member States to secure a minimum 30% share of European works in the catalogues as well as "ensuring prominence" of those works. "Prominence" involves promoting European works by facilitating access to such works using any appropriate means to ensure their prominence. The Directive has been implemented by Member States in different ways, ranging from very extensive and detailed measures to a mere reference to the general obligation to promote European works.
In Greece, the EU Directive was transposed into domestic law through Law 4779 of 20 February 2021. According to Art. 17 of the law, providers of on-demand audiovisual media services must ensure that at least 30% of the works in their catalogues are European and that these works are given prominence. These providers are required to report to the National Audiovisual and Communications Center (EKOME SA) each June on their compliance with these obligations for the previous year. Additionally, audiovisual service providers located in other Member States that offer services to consumers in Greece must annually contribute an amount equal to 1.5% of their turnover related to their activities in Greece. This amount is designated for the production of Greek audiovisual works, the purchasing of licenses for Greek audiovisual works that have not yet been distributed, or it may be paid to EKOME SA for funding Greek productions.

Under the EU Directive on Data Retention, operators were required to retain certain categories of traffic and location data (excluding the content of those communications) for a period between six months and two years and to make them available, on request, to law enforcement authorities for the purposes of investigating, detecting and prosecuting serious crime and terrorism. On 8 April 2014, the Court of Justice of the European Union declared the Directive invalid. However, not all national laws that implemented the Directive have been overturned. The Greek law implementing the Directive is still in place. Art. 6 of Law 3917/2011 goes even further in the implementation of the Data Retention Directive by requiring that retained data on ‘traffic and localisation’ stay ‘within the premises of the Hellenic territory.’

Art. 47.5 of Law No. 4002/2011 requires that data relating to the conduct of online gambling, as well as data exchanged between a player, licensee, internet service provider and financial institutions relating to such games, are stored in servers located in Greece for a period of 10 years. Moreover, according to Art. 30, in order to receive a licence, the legal entity must maintain a safe server in Greece, which will be connected to the Hellenic Gaming Commission (HGC).

The European Union General Data Protection Regulation (GDPR) provides a comprehensive framework for data protection that applies to all EU Member States. Greece implemented the GDPR in 2019 through Law No. 4624/2019.

Under the Directive on Data Retention, operators were required to retain certain categories of traffic and location data (excluding the content of those communications) for a period between six months and two years and to make them available, on request, to law enforcement authorities for the purposes of investigating, detecting and prosecuting serious crime and terrorism. On 8 April 2014, the Court of Justice of the European Union declared the Directive invalid. However, not all national laws that implemented the Directive have been overturned. The Greek law implementing the Directive is still in place. Specifically, Article 6 of Law 3917/2011 requires that data be retained for a period of 12 months, and it needs to be retained within the Hellenic territory.

The Directive 2000/31/EC (E-Commerce Directive) is the legal basis governing the liability of Internet Services Providers (ISPs) in the EU Member States and includes a conditional safe harbour. Not all Member States have transposed the relevant articles consistently, leading to divergent national case law that could cause legal insecurity on an EU level.

The Greek Presidential Decree 131/2003 implements the E-commerce Directive in Greece almost verbatim. The provisions in this Decree are considered to exempt the ISPs from every liability (civil, penal, administrative), even the severe liability of service providers according to Art. 8 of Law 2251/1994 on consumer protection. One considerable exemption to the no-liability rule is the field of data protection.

The Directive 2000/31/EC (E-Commerce Directive) is the legal basis governing the liability of Internet Services Providers (ISPs) in the EU Member States and includes a conditional safe harbour. Not all Member States have transposed the relevant articles consistently, leading to divergent national case law that could cause legal insecurity on an EU level.

The Greek Presidential Decree 131/2003 implements the E-commerce Directive in Greece almost verbatim. The provisions in this Decree are considered to exempt the ISPs from every liability (civil, penal, administrative), even the severe liability of service providers according to Art. 8 of Law 2251/1994 on consumer protection. One considerable exemption to the no-liability rule is the field of data protection.

It is reported that Greece imposes an identity requirement for SIM registration. Anyone wanting to purchase a SIM card has to provide their national ID card or a passport in case of foreigners to activate a new prepaid SIM card.

The Directive 2016/943 on the protection of undisclosed know-how and business information (trade secrets) is key in harmonising national laws concerning trade secrets. Greece transposed the Directive into national law in 2018, as well as with the Harmonization of Greek legislation with Directive (EU) 2016/943 of the European Parliament and of the Council of 8 June 2016 on the protection of know-how and undisclosed business information (trade secrets) against their illegal acquisition, use and disclosure (EEL 157 of 15.6.2016) - Measures to accelerate the work of the Ministry of Economy and Development and other provisions.

It is reported that passive sharing is mandated and is effective in both the mobile and fixed sectors. In addition, Directive 2014/61/EU (Art. 3.2) establishes that Member States shall ensure that, upon written request of an undertaking providing or authorised to provide public communications networks, any network operator must meet all reasonable requests for access to its physical infrastructure under fair and reasonable terms and conditions, including price, with a view to deploying elements of high-speed electronic communications networks. Such written request shall specify the elements of the project for which the access is requested, including a specific time frame.

The Hellenic Telecommunications Organisation S.A. (OTE) is the incumbent telecommunications provider in Greece. Although the company was privatised in 2001 and the Greek state has been gradually reducing its participation in OTE's share capital, it is reported that Greece still owns 7.2% of OTE's share capital.

Greece does not mandate functional separation for operators with significant market power (SMP) in the telecom market. However, accounting separation is a remedy that may be imposed on SMP operators. It is currently imposed on the incumbent and the three mobile operators.