{"id":105055,"date":"2026-10-24T09:00:29","date_gmt":"2026-10-24T07:00:29","guid":{"rendered":"https:\/\/www.viafirma.com\/?p=105055"},"modified":"2026-10-16T13:18:55","modified_gmt":"2026-10-16T11:18:55","slug":"ironclad-contracts","status":"publish","type":"post","link":"https:\/\/www.viafirma.com\/en\/ironclad-contracts\/","title":{"rendered":"Ironclad contracts and digital signatures in the letting of properties"},"content":{"rendered":"<p data-path-to-node=\"1\">Spain\u2019s rental market is experiencing a perfect storm driven by low supply and high demand. Although candidates and landlords usually act in good faith to build a smooth relationship, certain situations can still put either party in a tough spot.<\/p>\n<p data-path-to-node=\"2\">Legal certainty, however, provides effective protection against forged documents and scam attempts. Today, creating bulletproof rental contracts through simple best practices is a common way to seal transparent, airtight agreements for both parties right from day one.<\/p>\n<h2 data-path-to-node=\"3\">Major Issues When Renting a Property<\/h2>\n<ul data-path-to-node=\"4\">\n<li>\n<p data-path-to-node=\"4,0,0\"><b data-path-to-node=\"4,0,0\" data-index-in-node=\"0\">Forged Documentation:<\/b> Securing a rental home is no easy task. As a result, it is increasingly common to encounter applicants presenting fake payslips, employment history reports generated via AI tools like ChatGPT or edited in Photoshop, or even fictitious employment contracts.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"4,0,0\"><b data-path-to-node=\"4,1,0\" data-index-in-node=\"0\">Unreported or Unconsented Subletting:<\/b> Subletting is more widespread in Spain than many realize. However, the Urban Leases Act (LAU) is clear: <i data-path-to-node=\"4,1,0\" data-index-in-node=\"142\">&#8220;The rented property may only be partially sublet with the landlord&#8217;s prior written consent&#8221;<\/i> (Article 8.2).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"4,2,0\"><b data-path-to-node=\"4,2,0\" data-index-in-node=\"0\">Contract Signature Tampering:<\/b> Alterations can also occur after a contract is signed, whether in person or via PDF. For instance, annexes may be modified or signatures left unauthenticated, sparking disputes over the final agreed version, completion date, or signature validity. Without robust electronic evidence, landlords are left unprotected in dispute proceedings.<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"5\">Fraudulent booking deposits\u2014an increasingly frequent and sophisticated scheme\u2014also warrant mention. Cybercriminals use this tactic to target rental applicants: they list irresistible property deals on digital platforms and demand a \u20ac350 deposit via instant transfer (like Bizum) to schedule a viewing, claiming a high volume of requests.<\/p>\n<p data-path-to-node=\"6\">A quick search of the property details (such as the seller&#8217;s name or street number) reveals these listings are fake, but scammers often claim victims before the ad gets taken down. According to the Ministry of the Interior&#8217;s Q4 2025 Crime Report, online fraud\u2014which includes fake housing ads and advance payments for non-existent furnishings\u2014accounted for 430,493 criminal offenses between January and December.<\/p>\n<h2 data-path-to-node=\"7\">How to Legally Verify Tenant and Landlord Identity<\/h2>\n<p data-path-to-node=\"8\">Screening applicants does not require complex procedures; it simply takes knowing what documentation to request and how to interpret it while respecting privacy laws.<\/p>\n<p data-path-to-node=\"9\">Here is the documentation needed to verify applicant identity and financial solvency:<\/p>\n<h3 data-path-to-node=\"10\">Documents to Request from Applicants<\/h3>\n<ul data-path-to-node=\"11\">\n<li>\n<p data-path-to-node=\"11,0,0\">Valid ID card\/passport<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,1,0\">Last three payslips and employment contract (or proof of income for self-employed individuals)<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"11,2,0\">Employment history report (<i data-path-to-node=\"11,2,0\" data-index-in-node=\"27\">Informe de vida laboral<\/i>) issued by the Social Security General Treasury (TGSS), a key tool against forgery<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"12\">Banking History and Financial Tools<\/h3>\n<ol start=\"1\" data-path-to-node=\"13\">\n<li>\n<p data-path-to-node=\"13,0,0\">Checking real estate delinquency registries such as ASNEF or FIM<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,1,0\">Requesting a bank account ownership certificate provided by the applicant<\/p>\n<\/li>\n<\/ol>\n<h2 data-path-to-node=\"14\">Digital Authentication and Signatures<\/h2>\n<p data-path-to-node=\"15\">Beyond standard verification methods, advanced tech solutions like Viafirma cover key aspects of the leasing process:<\/p>\n<ol start=\"1\" data-path-to-node=\"16\">\n<li>\n<p data-path-to-node=\"16,0,0\"><b data-path-to-node=\"16,0,0\" data-index-in-node=\"0\">Signing Real Estate Documents:<\/b> Earnest money agreements (<i data-path-to-node=\"16,0,0\" data-index-in-node=\"57\">contratos de arras<\/i>), lease agreements, and reservation contracts.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"16,1,0\"><b data-path-to-node=\"16,1,0\" data-index-in-node=\"0\">Applicant Identity Verification:<\/b> Viafirma offers multiple sign-in authentication mechanisms\u2014both mandatory and optional\u2014including email authentication and OTPs via Email or SMS.<\/p>\n<\/li>\n<\/ol>\n<h2 data-path-to-node=\"18\">Contract Traceability with Viafirma Tools<\/h2>\n<p data-path-to-node=\"19\">How do you ensure full legal validity for every transaction? Advanced electronic signatures offer a reliable answer. Viafirma provides features that streamline the process efficiently for both parties:<\/p>\n<ul data-path-to-node=\"20\">\n<li>\n<p data-path-to-node=\"20,0,0\"><b data-path-to-node=\"20,0,0\" data-index-in-node=\"0\">Non-repudiation Guarantee and Timestamps:<\/b> Viafirma tools allow tenants to sign leases from any location or device. The platform records all electronic evidence, preventing either party from repudiating the agreement later.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"20,1,0\"><b data-path-to-node=\"20,1,0\" data-index-in-node=\"0\">Attached Annexes:<\/b> Landlords can attach key annexes, such as property inventory or condition reports, ensuring tenants review all essential details and cannot disclaim them later.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"20,2,0\"><b data-path-to-node=\"20,2,0\" data-index-in-node=\"0\">Audit Trail Document:<\/b> Once signed, the system automatically generates an audit trail containing full process details. This file guarantees document integrity and serves as admissible evidence in court if disputes arise.<\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"21\">Forging Bulletproof Contracts in 2026 Is in Your Hands<\/h2>\n<p data-path-to-node=\"22\">The takeaway is clear: combining proper documentation with Viafirma\u2019s digital identity and electronic signature solutions turns renting into a transparent, legally protected process.<\/p>\n<p data-path-to-node=\"23\">Want to learn more about Viafirma&#8217;s digital solutions? Contact our sales team today to explore your options.<\/p>\n<p data-path-to-node=\"24\"><div class=\"vf_related_posts_wrapper\"><h3 class=\"vf_related_posts_title\">Related articles<\/h3><div class=\"vf_related_posts\"><div class=\"vc_gitem-post-data-source-post\"><a href=\"https:\/\/www.viafirma.com\/en\/remote-real-estate-transactions\/\" class=\"vc_gitem-post-link\"><img src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2026\/10\/131026_blog_inmueble-1-300x186.webp\" alt=\"Remote real estate transactions with Viafirma\" loading=\"lazy\" decoding=\"async\"><\/a><div class=\"vc_gitem-post-data-source-post_category\"><a href=\"https:\/\/www.viafirma.com\/en\/category\/blog-en\/real-estate-sector\/\">Real estate sector<\/a><\/div><h4 class=\"vc_gitem-post-data-source-post_title\"><a href=\"https:\/\/www.viafirma.com\/en\/remote-real-estate-transactions\/\">Remote real estate transactions with Viafirma<\/a><\/h4><\/div><div class=\"vc_gitem-post-data-source-post\"><a href=\"https:\/\/www.viafirma.com\/en\/the-digitization-of-tecnologia-inmobiliaria\/\" class=\"vc_gitem-post-link\"><img src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2024\/04\/300424_blog_clienteinmobiliaria-300x186.webp\" alt=\"Tecnolog\u00eda Inmobiliaria\" loading=\"lazy\" decoding=\"async\"><\/a><div class=\"vc_gitem-post-data-source-post_category\"><a href=\"https:\/\/www.viafirma.com\/en\/category\/blog-en\/success-stories\/\">Success stories<\/a><\/div><h4 class=\"vc_gitem-post-data-source-post_title\"><a href=\"https:\/\/www.viafirma.com\/en\/the-digitization-of-tecnologia-inmobiliaria\/\">Tecnolog\u00eda Inmobiliaria<\/a><\/h4><\/div><div class=\"vc_gitem-post-data-source-post\"><a href=\"https:\/\/www.viafirma.com\/en\/earnest-money-contract\/\" class=\"vc_gitem-post-link\"><img src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2024\/04\/portada_blog_arras_opt-300x186.webp\" alt=\"Is it mandatory to make an earnest money contract?\" loading=\"lazy\" decoding=\"async\"><\/a><div class=\"vc_gitem-post-data-source-post_category\"><a href=\"https:\/\/www.viafirma.com\/en\/category\/blog-en\/real-estate-sector\/\">Real estate sector<\/a><\/div><h4 class=\"vc_gitem-post-data-source-post_title\"><a href=\"https:\/\/www.viafirma.com\/en\/earnest-money-contract\/\">Is it mandatory to make an earnest money contract?<\/a><\/h4><\/div><\/div><\/div> <div class=\"custom-author-block\"><div class=\"custom-author-photo-wrapper\"><img decoding=\"async\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2025\/06\/Noelia_garcia-150x150.webp\" class=\"custom-author-photo\" alt=\"Noelia Garc\u00eda\"><\/div><div class=\"custom-author-meta\"><div class=\"custom-author-name\">Noelia Garc\u00eda<a href=\"https:\/\/www.linkedin.com\/in\/noelia-garcia-egea\/\" target=\"_blank\" rel=\"noopener\" class=\"linkedin-icon\" aria-label=\"Perfil de LinkedIn de Noelia Garc\u00eda\"><svg aria-hidden=\"true\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 24 24\" fill=\"#0062be\"><path d=\"M19 0h-14c-2.761 0-5 2.239-5 5v14c0 2.761 2.239 5 5 5h14c2.762 0 5-2.239 5-5v-14c0-2.761-2.238-5-5-5zm-11 19h-3v-10h3v10zm-1.5-11.268c-.966 0-1.75-.784-1.75-1.75s.784-1.75 1.75-1.75 1.75.784 1.75 1.75-.784 1.75-1.75-1.75zm13.5 11.268h-3v-5.604c0-3.357-4-3.099-4 0v5.604h-3v-10h3v1.354c1.396-2.586 7-2.777 7 2.476v6.17z\"\/><\/svg><span class=\"screen-reader-text\">Perfil de LinkedIn de Noelia Garc\u00eda<\/span><\/a><\/div><hr class=\"custom-author-separator\"><p class=\"custom-author-bio\">Noelia is part of Viafirma&#039;s Marketing department, where she is in charge of the strategy and writing of the corporate blogs. She brings the reader the latest news about technology, digital identity and digital transformation in a clear, useful and updated way.\r\n<\/p><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"Spain\u2019s rental market is experiencing a perfect storm driven by...","protected":false},"author":20,"featured_media":105057,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[167],"class_list":["post-105055","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-real-estate-sector"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/posts\/105055","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/comments?post=105055"}],"version-history":[{"count":1,"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/posts\/105055\/revisions"}],"predecessor-version":[{"id":105147,"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/posts\/105055\/revisions\/105147"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/media\/105057"}],"wp:attachment":[{"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/media?parent=105055"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/categories?post=105055"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}