Recognized electronic signatures are the highest standard of security and legal validity in the European and global digital ecosystem. As organizations move away from paper, the need to secure commercial agreements and legal procedures makes it essential to understand this technology.
\nChoosing the wrong type of signature can result in a contract being invalidated or security breaches. This article explains what a recognized electronic signature is, its legal framework under the eIDAS Regulation, in which cases it is mandatory, and how to implement it efficiently.
","strapi_component":"blog.content-rich-text"},{"id":90,"text":"The qualified electronic signature is the only one that reverses the burden of proof in a legal dispute. If someone repudiates a contract, it will be that person who must technically prove that the signature is not theirs, providing companies with absolute legal protection against fraud.
","color":"default","strapi_component":"blog.callout"},{"id":994,"name":null,"description":"CTA: Sign documents now with full legal validity
","button":"Use Tecalis Sign Business for 6 months","url":"https://www.tecalis.com/products/electronic-signature","blank":true,"image":null,"strapi_component":"blog.cta"},{"id":4224,"text":"A recognized electronic signature is one that is based on a qualified certificate and is generated by a secure signature creation device (QSCD).
\nThus, a recognized electronic signature is a type of electronic signature that is considered, for all legal purposes, a direct equivalent to a traditional handwritten signature.
\nIt works on the basis of asymmetric cryptography and public key infrastructures (PKI). Recognized electronic signatures are currently referred to as qualified electronic signatures under the European eIDAS regulation. The process guarantees three fundamental principles:
\nNon-repudiation: It prevents the signer from legally denying that they signed the document.
\nTo obtain a recognized electronic signature, the critical step is the prior electronic identification of the user. A qualified certificate cannot be issued without a Qualified Trust Service Provider (QTSP) verifying the applicant's real identity.
\nTo achieve this unambiguous identification, providers use extremely secure mechanisms that comply with Anti-Money Laundering (AML) and Know Your Customer (KYC) regulations. The most common methods include:
\nThe issuance of a qualified certificate requires compliance with anti-money laundering regulations. Fortunately, biometric and AI technologies such as video identification allow this rigorous step to be completed 100% remotely and in just a few minutes.
","color":"default","strapi_component":"blog.callout"},{"id":915,"title":null,"alt":"Woman signing a document related to a qualified electronic signature at an office desk.","figcaption":null,"link":null,"blank":null,"image":{"id":4897,"name":"firma_electronica_reconocida_interior1.png","hash":"validacion_documento_identidad_interior_1_5_1_378fe80c8c","sha256":null,"ext":".png","mime":"image/png","size":155.37,"url":"/uploads/validacion_documento_identidad_interior_1_5_1_378fe80c8c.png","provider":"local","provider_metadata":null,"created_at":"2026-03-02T08:42:10.000Z","updated_at":"2026-03-02T08:42:56.000Z","alternativeText":"","caption":"","width":954,"height":525,"formats":{"thumbnail":{"name":"thumbnail_validación-documento-identidad_interior_1 (5) (1).png","hash":"thumbnail_validacion_documento_identidad_interior_1_5_1_378fe80c8c","ext":".png","mime":"image/png","width":245,"height":135,"size":56.06,"path":null,"url":"/uploads/thumbnail_validacion_documento_identidad_interior_1_5_1_378fe80c8c.png"},"medium":{"name":"medium_validación-documento-identidad_interior_1 (5) (1).png","hash":"medium_validacion_documento_identidad_interior_1_5_1_378fe80c8c","ext":".png","mime":"image/png","width":750,"height":413,"size":423.62,"path":null,"url":"/uploads/medium_validacion_documento_identidad_interior_1_5_1_378fe80c8c.png"},"small":{"name":"small_validación-documento-identidad_interior_1 (5) (1).png","hash":"small_validacion_documento_identidad_interior_1_5_1_378fe80c8c","ext":".png","mime":"image/png","width":500,"height":275,"size":199.8,"path":null,"url":"/uploads/small_validacion_documento_identidad_interior_1_5_1_378fe80c8c.png"}},"previewUrl":null,"localFile___NODE":"6a752922-3e94-56bd-8717-b0e9b6d332d1"},"strapi_component":"blog.image"},{"id":4225,"text":"The qualified certificate is, in essence, the signer's \"digital ID card.\" It is an electronic document issued by a Certification Authority that links the validation data of a signature to a natural or legal person, confirming their identity in an irrefutable manner.
\nFor a signature to be considered \"recognized\" or \"qualified,\" the certificate must meet strict technical requirements regulated by eIDAS:
\nThe eIDAS Regulation classifies electronic signatures into three technical and legal levels. Choosing the right one is vital to ensure the legal certainty of corporate agreements:
\nRegulation (EU) No. 910/2014 (eIDAS) is the cornerstone of the digital trust ecosystem in Europe. Its main objective is to ensure that cross-border electronic interactions between businesses, citizens, and public authorities are secure and seamless.
\nIn Spain, this regulation is complemented by Law 6/2020 regulating certain aspects of electronic trust services.
\nThe most important legal principle of recognized electronic signatures is found in Article 25.2 of the eIDAS Regulation: \"A qualified electronic signature shall have the same legal effect as a handwritten signature.\"
\nThis means that no judge or administration can reject a document simply because it is signed electronically if it has a qualified signature.
\nIt also provides the principle of non-repudiation: the signer cannot deny having signed the document unless they can technically prove that the certificate was hacked or stolen.
","strapi_component":"blog.content-rich-text"},{"id":916,"title":null,"alt":"Woman wearing glasses filling out a form related to a recognized electronic signature on a clipboard, in a bright workspace next to a window.","figcaption":null,"link":null,"blank":null,"image":{"id":4898,"name":"firma_electronica_reconocida_interior_2.png","hash":"validacion_documentos_identidad_interior_2_1_b2a5ec0e03","sha256":null,"ext":".png","mime":"image/png","size":335.13,"url":"/uploads/validacion_documentos_identidad_interior_2_1_b2a5ec0e03.png","provider":"local","provider_metadata":null,"created_at":"2026-03-02T08:50:35.000Z","updated_at":"2026-03-02T08:51:26.000Z","alternativeText":"","caption":"","width":1272,"height":700,"formats":{"thumbnail":{"name":"thumbnail_validacion-documentos-identidad_interior_2 (1).png","hash":"thumbnail_validacion_documentos_identidad_interior_2_1_b2a5ec0e03","ext":".png","mime":"image/png","width":245,"height":135,"size":50.45,"path":null,"url":"/uploads/thumbnail_validacion_documentos_identidad_interior_2_1_b2a5ec0e03.png"},"large":{"name":"large_validacion-documentos-identidad_interior_2 (1).png","hash":"large_validacion_documentos_identidad_interior_2_1_b2a5ec0e03","ext":".png","mime":"image/png","width":1000,"height":550,"size":742.01,"path":null,"url":"/uploads/large_validacion_documentos_identidad_interior_2_1_b2a5ec0e03.png"},"medium":{"name":"medium_validacion-documentos-identidad_interior_2 (1).png","hash":"medium_validacion_documentos_identidad_interior_2_1_b2a5ec0e03","ext":".png","mime":"image/png","width":750,"height":413,"size":423.29,"path":null,"url":"/uploads/medium_validacion_documentos_identidad_interior_2_1_b2a5ec0e03.png"},"small":{"name":"small_validacion-documentos-identidad_interior_2 (1).png","hash":"small_validacion_documentos_identidad_interior_2_1_b2a5ec0e03","ext":".png","mime":"image/png","width":500,"height":275,"size":191.46,"path":null,"url":"/uploads/small_validacion_documentos_identidad_interior_2_1_b2a5ec0e03.png"}},"previewUrl":null,"localFile___NODE":"dabc7d83-1928-5a9f-b5b7-3e11c2bb9e2b"},"strapi_component":"blog.image"},{"id":4227,"text":"There are regulated sectors where advanced electronic signatures are not sufficient and the law explicitly requires the use of recognized electronic signatures:
\nHow to digitize processes with full legal validity?
","button":"Read our success story","url":"https://www.tecalis.com/case-studies/as-real-estate-lease-digital-signature-re-agreements-contracts","blank":true,"image":null,"strapi_component":"blog.cta"},{"id":4228,"text":"Although a recognized signature offers maximum security, it requires a certificate issuance process (onboarding) that can cause commercial friction.
\nFor 95% of administrative and commercial procedures, the advanced electronic signature is the ideal option. The advanced electronic signature is fully valid, legal, and much faster for the user experience (UX).
\nIf a biometric or OTP (SMS) signature solution is used, a very robust legal shield is maintained without requiring the customer to have a prior certificate, and for high-risk processes, it can be complemented with KYC to achieve the same level of probative and legal value as a recognized or qualified signature.
\nIf your company or you as an individual need to use a qualified electronic signature, the process must follow a strict chain of trust dictated by eIDAS:
\nThe current process has left obsolete card readers and USB tokens behind. Today, cryptographic keys are securely stored on HSM servers in the cloud, allowing users to sign from their smartphones using simple two-factor authentication (2FA).
","strapi_component":"blog.content-rich-text"},{"id":4230,"text":"For companies looking to scale, digitize their document flows, and ensure regulatory compliance worldwide, implementing electronic signatures should not be seen as a simple \"digital patch,\" but as a comprehensive business transformation. Below, we list the best practices in the market:
\nImplementing recognized electronic signatures ensures maximum legal protection for corporations and opens the door to a truly digital, efficient, and globalized economy.
","strapi_component":"blog.content-rich-text"},{"id":996,"name":null,"description":"Discover how electronic signatures work with Tecalis Sign
","button":"Try it for 6 months with no obligation","url":"https://www.tecalis.com/products/electronic-signature","blank":true,"image":null,"strapi_component":"blog.cta"},{"id":36,"title":"Frequently asked questions (FAQs)","list":"