Legalpin Blog
5 Steps to Sign a Document with Digital Certificate
Discover 5 key steps to sign a PDF document with a digital certificate securely and keep its full legal validity.
8 Best Signaturit alternatives for electronic signature for 2026
Comparison of the 8 best Signaturit alternatives in 2026: Legalpin, DocuSign, Adobe Acrobat Sign, Viafirma, Tecalis, Lleida.net, Docuten and Firmafy, with selection criteria and company profile analysis.
8 Best certified email software for consulting firms in 2026
Detailed comparison of the best certified email programmes for consulting firms and advisory practices in 2026.
Certified email for sales and marketing: uses and regulations
Complete guide to certified email in sales and marketing: binding offers, general terms of sale, customer contracts, product warranty claims, B2B late payment and GDPR compliance, with the legal framework of Spain’s Civil Code, Commercial Code and Law 1/2025 MASC.
Certified email for purchasing departments: uses and regulations
Practical guide to certified email in purchasing and procurement: supplier onboarding, purchase orders, breach-of-contract claims, B2B late payment and mandatory e-invoicing — with the legal framework of Spain’s Law 3/2004 and Royal Decree 238/2026.
How to Sign Social Security Notifications Online
Learn how to sign Social Security notifications online with full legal validity, complete traceability, and digital security.
Best 10 Certified Email Solutions for Human Resources
We review the 10 best certified email tools for HR and how they ensure legal validity and streamline internal workflows.
Practical Guide to Sending Certified Email from Gmail
Practical guide to send a certified Gmail email via Legalpin, ensuring legal proof and complete communication security.
Certified email for facilities management: uses and regulations
How certified email protects facilities managers, contractors and service companies: RD 171/2004 CAE, maintenance contracts, incident reporting and employment communications with legally binding evidence.
Certified email for hospitality: uses and regulations
How certified email protects hotels, tourist apartments and restaurants in Spain: RD 933/2021, GDPR, employment communications and claims management with legally binding evidence.
