Woman checking her Buromail

Certified Email with Legal Validity

Legalpin’s encrypted and certified email guarantees maximum security and legal validity in your electronic communications. With our solution, each email is legally backed, protecting your information with the confidence your company needs.

+ 30,000 successful sends each month

What Does Sending a Certified Email Entail?

Sending a Certified Email goes far beyond just sending an email. It means giving that communication the same legal value as a burofax or certified letter, but with the speed and convenience of the digital environment.

When you use Legalpin, each message is backed by an accredited trusted third party. This ensures that the content, date, time, IP, and delivery or read status of the email are securely recorded. Everything is sealed with a digital certificate with legal validity in Spain and the European Union.

In other words, a Certified Email turns a simple email conversation into a reliable notification, valid as evidence in any claim, audit, or legal proceeding.

In addition, the process is completely secure: Legalpin encrypts the information end-to-end, protects the data in accordance with the GDPR, and automatically generates a probative PDF that you can keep or present if necessary.

It is the easiest, fastest, and most economical way to give legal security to your electronic communications without changing your email, without installations, and without complications.

Buromail on laptop

OUR CERTIFIED EMAIL SERVICE ALLOWS YOU TO:

  • Send reliable non-payment notifications to your defaulting clients, backing up your claims with irrefutable evidence.
  • Issue and send digital invoices with delivery and read receipts, ensuring the reception and traceability of your financial documents.
  • Provide valid evidence in your VAT recovery requests for unpaid invoices.

DIGITAL SOLUTIONS
FOR YOUR
COMPANY

What is a Certified Email?

A Certified Email is an email sent to a recipient with the guarantee of a trusted third party accredited by the Ministry of Industry. This third party acts as an independent witness that the communication has been carried out successfully.

It also has an easy and fast integration system that you can attach to your usual email. You do not need to download any different software to start protecting your communications.

How is it Different from a Normal Email?

End-to-end encryption: Your emails are encrypted from sending to receiving, even on Legalpin’s servers. Only the authorized recipient can read the content.

Compliance with the Data Protection Law: Avoid penalties for sending personal or confidential information by email without the express consent of the recipient.

Proof of reliable notification: Receive a PDF certificate that proves the sending, content, attachments, recipient, successful delivery and reading, with the IP, device and browser of the recipient.

Secure and certified email

How to Send a Certified Email?

With Legalpin, sending an Encrypted and Certified Email is very simple:

  • Compose your email as usual
  • Send the email to a Legalpin address that we provide.
  • Confirm in the Subject if you want to send it to one or more recipients.

And that’s it! This simple and fast way you can protect every document, contract, signature, notification or electronic invoice that you send through Legalpin.

Does a Certified Email Have Legal Validity?

If it is issued by Legalpin, yes. We are a trusted third party accredited by the Ministry of Industry, we meet all the technical and legal requirements, and there are many court rulings that support our legal guarantee.

Protect your Digital Security

If you have ever had to send a burofax, you would never have imagined doing the same digitally by certified email would be so simple. Just copy Legalpin and we will send you the certificate immediately with the same legal validity!

Legalpin is the data protection solution for businesses that helps you anticipate and avoid surprises.

Secure entrepreneur with Legalpin

Unsure if your email has legal validity?

Evaluate whether your email communications are legally sound

Could you prove the exact content you sent to a judge?

A normal email can be altered. The Certified Email guarantees the integrity of the message and attachments.

Does your current system prove the delivery and reading of the email?

Standard acknowledgments do not have legal validity. Our PDF certificate is reliable proof.

Do you comply with the encryption required by the GDPR?

Legalpin applies end-to-end encryption, protecting sensitive data and complying with protection regulations.

Your Email is Legally Valid if:

You accredit the exact date/time with a qualified time stamp
You demonstrate the identity of the sender and recipient
You guarantee the integrity of the content and attachments
You record the effective delivery to the recipient's server
You comply with eIDAS, Law 6/2020, and GDPR data protection
You maintain secure custody of the evidence for years

Does your current email meet all these requirements?

Try Certified Email

No commitment · 70% more economical than burofax

4 Clear and practical benefits of Certified Email

We translate legality into real advantages: more security, fewer costs, and zero friction.

Immediate savings

Reduces up to 70% of the cost compared to burofax.

No travel, no waiting: everything from your email.

Legal validity in ES and EU

Complies with eIDAS and Law 6/2020.

Certificates signed and time-stamped, accepted by courts.

No additional software

Works with your usual email provider.

Integrate Legalpin in copy and you're done. Onboarding in minutes.

Immediate certificate

Receive a PDF with sending, delivery, reading, and full content.

Includes IP, browser, and destination server.

Use cases for Certified Email

Real scenarios where Legalpin simplifies and protects your communications.

Lawyers

Before filing a lawsuit, you need to prove the extrajudicial attempt. With Legalpin, you send a binding offer by regular mail and instantly get a certificate with sending, delivery, and full content.

Even if the recipient does not open the message, you can prove the making available and avoid inadmissibility for lack of prior attempt. Result: procedural security and lower costs than a burofax.

Companies

Communicate dismissals, sanctions, renewals, contractual changes, or payment claims with complete traceability.

Each communication is backed by a signed and sealed PDF that records date, time, IP, server, and browser. Integrated into your email, without extra software: easy compliance and auditing, fewer internal disputes, and shorter management times.

Individuals

Claim to your bank, insurer, or landlord with a notification that does leave a record. You send the usual email, add Legalpin in copy, and receive reliable proof that activates deadlines and neutralizes the classic “we didn’t receive anything”.

All without traveling, with a much lower cost than traditional methods, and legal validity when you need it.

Ready in 1 minute · No installation

Send your first certified email today

  • Reliable proof: sending, delivery, and content.
  • Compliance: eIDAS · Law 6/2020.
  • Real savings compared to burofax.

Response on the same day

Security, compliance, and audits

We align the service with European and Spanish frameworks so that each communication has probative value. We apply encryption, access controls, and custody policies that reinforce integrity and privacy from the design.

eIDAS GDPR TLS Encryption WORM Custody Privacy by default

Regulations and compliance commitments

  • eIDAS: principles of identification, time stamp, and electronic evidence in the EU.
  • GDPR and LOPDGDD: legal basis, minimization, and rights of the data subject.
  • ISO 27001 best practices (without certification) for security management.
  • Privacy by default and configuration to reduce data exposure.

Encryption and custody of evidence

  • Encryption in transit with TLS 1.2 or higher.
  • Encryption at rest and segregation by client.
  • Time stamp and unique hash for traceability and integrity.
  • Immutable WORM-type custody during the defined legal period.
  • Documented retention and secure deletion policies.

Internal processes and controls

  • Access control by roles and multi-factor authentication.
  • Activity logs with traceability and periodic reviews.
  • Principle of minimum privilege and segregation of duties.
  • Business continuity and geographically redundant backups.

Transparency and support

  • Technical summary of security and privacy for legal teams and DPO.
  • Secure configuration and integration guides with your email.
  • Support channel for compliance questions.

Security architecture

  • 1 Encrypted sending via TLS
  • 2 Content hash and time stamp
  • 3 Immutable custody and access control
  • 4 Evidence verification

CHOOSE YOUR CERTIFIED EMAIL PLAN

€144 / Year

FREELANCERS

Certified Email

✔ Buromail: Certified and encrypted email

✔ Reliable communication from your usual email

✔ Compatible with Outlook, Gmail and more

✔ 144 certified sends per year

And also…

✔ Certified SMS from your email

✔ Integrated advanced digital signature

✔ Up to 2 user accounts

✔ Human technical support by email 24/7

€36 / Month

LEGALPIN PRO

Certified Email

✔ Buromail: Certified and encrypted email

✔ Use from your corporate email, without installations or changes

✔ Encrypted security with legal validity and GDPR compliance

✔ Encrypted storage of certificates in the app

✔ 40 certified sends per month

And also…

✔ Advanced digital signature from your email

✔ Certified SMS from your email

✔ Up to 5 user accounts

✔ 24/7 support by phone or email

€72 / Month

SMES

Certified Email

✔ Buromail: Certified and encrypted email

✔ Full legal compliance with automatic encryption

✔ Easy integration with corporate platforms

✔ 80 certified sends per month

And also…

✔ Advanced digital signature from your email

✔ Certified SMS from your email

✔ Unlimited user accounts

✔ 24/7 support by phone or email

Myths vs Realities

We debunk misconceptions about Certified Email

"A normal email already has legal validity"

Without certification, there is no guarantee of integrity, authorship, or delivery of the message and attachments.

Only certified email is legal proof

Includes eIDAS time stamp, cryptographic hash, and certificate of delivery to the server.

"Requires changing email manager"

It is believed that you have to install special software or change platforms.

Works with your current email

You use Outlook, Gmail, or your usual client. You only add Legalpin in copy.

"Burofax is safer"

The tradition of paper generates a false sense of greater legal security.

Greater traceability than burofax

70% more economical, immediate delivery, and certified full content.

Testimonials

Roberto Lagoa

Ceo RLS Lawyers

Emilio R. Del Cerro Rubio

CEO at Respuesta Juridica

The Buromail service is a service that is very easy to use, very intuitive. You only have to send an email and it meets the same requirements as a court .”

Pablo Franco

Lawyer

Frequently Asked Questions (FAQs)

We resolve the most common doubts about certified email so you can make the best decision.

What happens if the recipient does not open the email?

With certified email, you can prove the making available: the certificate records the sending, the delivery to the recipient's server, and the exact content.

If the person does not open the message, you demonstrate that the communication was accessible to the recipient on a specific date and time (key in extrajudicial attempts or calculation of deadlines). If it is opened later, the system records that reading and adds it to the timeline of the evidence.

Does it serve as evidence in a civil, commercial, or labor trial?

Yes. The certificate generates electronic documentary evidence with signature and time stamp, which includes issuer, recipients, subject, full content, attachments, and technical traceability (servers, IP, delivery results).

In practice, it allows you to certify prior notifications (binding offers, claims, contractual changes) and reduce the need for ad hoc expert reports by providing complete and verifiable evidence. (This is not legal advice: the specific use will depend on the case and the criteria of the resolving body.)

Is it valid throughout the European Union?

The service aligns with the certified electronic delivery recognized by the European framework, which facilitates its cross-border use as evidence.

The specific procedural admissibility may vary depending on the procedure or country, but the format (signature, timestamp, traceability) is designed to fit with European standards and good practices of eIDAS.

How exactly is it sent from my email?

You don't change tools:

1) Write your email in Gmail, Outlook, or your corporate client (include attachments if any).
2) Add the Legalpin address we provide in CC.
3) Send and instantly receive your PDF certificate.

Best practices: use a descriptive subject and, if there are multiple recipients, include them without problem (the evidence will reflect the trace for each one).

What does the certificate include and how is it verified?

It includes: sender, recipients, subject, date/time of sending, delivery (or attempt and reason for failure), read receipt if it occurs, full content of the message, attachments (with their hash), IP and involved servers, in addition to electronic signature and timestamp.

Verification: any party can check the integrity of the certificate and the hashes; the timestamp proves that the evidence existed at that moment. You can also download again the evidence from your panel.

Can I send large or multiple attachments? Are they also certified?

Yes. The attachments travel encrypted and their integrity is guaranteed by a hash included in the certificate.

Recommendations: use non-editable formats when appropriate (PDF), name the files clearly, and keep the same version you sent. For very large files, consider compressing or linking to a repository (the link will be reflected in the content).

What happens if there are bounces, filters, or the recipient's server is down?

The system records the technical event: hard bounce (non-existent domain), soft bounce (mailbox full, size exceeded), antispam filters, or server timeouts.

With that trace, you can prove due diligence and decide to retry with adjustments (e.g., reduce attachment size) or change channels. Improve deliverability by keeping SPF/DKIM/DMARC correctly configured in your domain.

Does it comply with GDPR and security?

Yes. We apply encryption, signature, access control, and secure custody of evidence, following principles of minimization and purpose limitation.

You can request the data processing agreement (DPA), review retention policies, and define who within your organization can access the evidence.

How long does it take, how long is it stored, and how do I recover it?

The certificate arrives in seconds after sending. The evidence is stored and you can download it when you need it.

As an internal policy, we recommend archiving a copy in your document manager (with clear name and metadata) for future searches and audits.

When does a burofax or notary make sense?

The burofax or notarial intervention are still useful when the recipient requires a physical channel, the regulations impose it, or you are looking for an in-person action (minutes, proceedings).

For most day-to-day legal notifications, certified email provides the same evidentiary purpose with less cost, more speed, and better technical traceability.