{"id":1002,"date":"2026-01-17T18:41:37","date_gmt":"2026-01-17T16:41:37","guid":{"rendered":"https:\/\/etimologiera.gr\/?p=1002"},"modified":"2026-01-19T20:36:26","modified_gmt":"2026-01-19T18:36:26","slug":"what-is-mydata-complete-guide-for-businesses-accountants","status":"publish","type":"post","link":"https:\/\/etimologiera.gr\/en\/2026\/01\/17\/what-is-mydata-complete-guide-for-businesses-accountants\/","title":{"rendered":"What Is myDATA \u2013 Complete Guide for Businesses & Accountants"},"content":{"rendered":"\t\t
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What Is myDATA \u2013 Complete Guide for Businesses & Accountants<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The transition to the digital tax era has fundamentally changed the way businesses and accounting firms operate. myDATA forms the foundation of this transformation; however, it is no longer sufficient on its own.<\/strong>
Full compliance now requires the use of an Electronic Invoicing Provider.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Why an Electronic Invoicing Provider Is Now Required<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Mandatory electronic invoicing does not replace a company\u2019s ERP or commercial software.
The issuance of the document continues to take place within the company\u2019s own system.<\/p>

The Electronic Invoicing Provider is responsible for:<\/p>

\u2022 Transmitting<\/strong> invoice data to the Greek Tax Authority (AADE) via myDATA<\/p>

\u2022 Validating accuracy and compliance<\/strong> with AADE specifications<\/p>

\u2022 Authenticating<\/strong> the invoice<\/p>

\u2022 Receiving and returning<\/strong> the Unique Registration Number (M.A.R.K<\/strong>.)<\/p>

\u2022 Generating and returning the QR Code<\/strong><\/p>

\u2022 Creating and managing the invoice in the standardized electronic invoice format<\/strong> as defined by the regulatory framework<\/p>

\u2022 Secure archiving<\/strong> and full traceability of the transaction<\/p>

Without an Electronic Invoicing Provider, a business cannot fully comply with the technical and legal framework of electronic invoicing, which becomes fully mandatory from 2026.<\/em><\/p>

\ud83d\udc49 For a detailed implementation timeline and full preparation guidance, see the Electronic Invoicing 2026 Guide.<\/a><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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How e-timologiera Simplifies Electronic Invoicing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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e-timologiera<\/strong> is not just another provider. It is a complete electronic invoicing platform designed to address both the technical and business needs of the new digital era.<\/p>

The e-timologiera solution:<\/strong><\/p>

\u2022 Operates as an AADE-certified Electronic Invoicing Provider<\/strong><\/p>

\u2022 Ensures full compliance<\/strong> with myDATA and the applicable regulatory framework<\/p>

\u2022 Supports B2B, B2G, and B2C<\/strong> transactions<\/p>

\u2022 Provides the standardized electronic invoice format<\/strong> in accordance with official specifications<\/p>

\u2022 Automatically manages transmission, authentication, M.A.R.K., QR Code generation, and archiving<\/strong><\/p>

\u2022 Offers a modern REST API<\/strong> for seamless integration with ERP and commercial systems<\/p>

\u2022 Includes a sandbox environment and technical support<\/strong> for IT companies and software houses<\/p>

With e-timologiera, businesses and accountants gain full control, security, and transparency throughout the electronic invoicing process\u2014without the risk of non-compliance or technical issues.<\/p>

For a technical overview of ERP-to-provider integration, see the guide:How to Connect Your ERP\u2026<\/em><\/a><\/strong><\/p>

myDATA is only the beginning.
True compliance starts with an Electronic Invoicing Provider.<\/p>

Request a free demo & technical guidance<\/strong><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\ud83d\udc49 Developers & ERP companies can explore:<\/strong><\/p>

Developers & API<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

What Is myDATA \u2013 Complete Guide for Businesses & Accountants The transition to the digital tax era has fundamentally changed the way businesses and accounting firms operate. myDATA forms the foundation of this transformation; however, it is no longer sufficient on its own.Full compliance now requires the use of an Electronic Invoicing Provider. Why an […]<\/p>\n","protected":false},"author":2,"featured_media":511,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1002","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1"],"_links":{"self":[{"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/posts\/1002","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/comments?post=1002"}],"version-history":[{"count":13,"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/posts\/1002\/revisions"}],"predecessor-version":[{"id":1106,"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/posts\/1002\/revisions\/1106"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/media\/511"}],"wp:attachment":[{"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/media?parent=1002"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/categories?post=1002"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/etimologiera.gr\/en\/wp-json\/wp\/v2\/tags?post=1002"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}