Safe Creative
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Email certification · eIDAS

Certify the sending of your emails with legal value

A normal email proves nothing: its content and headers can be modified. SafeStamper Mail turns every send into solid evidence —content, recipients, date and time— time-stamped and admissible as evidence.

Certify an email See plans and prices

Nothing to install · put one address in copy and that is it · eIDAS backing (EU 910/2014).

The problem

Your word against theirs is not evidence

Every day your company sends contracts, invoices, claims and proposals by email. The day someone denies it, an uncertified email is worth the same as the other party word.

A normal email: content and headers can be modified, with no certain date or proof of sending.
A certified email: content, recipients and moment of sending stamped and verifiable.
Start today, not the day you already have the conflict.
How it works

Certify in four steps, or automate it

No software to install, no need to change your email client or learn a new tool. You certify with the email you already use.

01

Create your account

Sign up for a Safe Stamper account. Nothing to install.

You keep the email address you already have.

02

Add an address in copy

When you send your email, add our certification address in CC or BCC.

One tiny action is all it takes.

03

The delivery is time-stamped

The content, the recipients, the attachments and the date are recorded in the certificate.

Mail certifies the sending, not the reading.

04

Get your certificate

A signed and time-stamped PDF with the full email, ready to file or to submit.

It can also be wired into automated workflows.

00:00 / 00:26
Do you want to notify the recipient that the email has been certified? Use certifywithcopy@safestamper.com and they will receive a copy of the certification.
Why get it

What you send stops being disputable

Against non-payments and claims

Prove that you sent the invoice, the notice or the demand on time, to the right address and with the exact content.

Contractual deadlines with backing

If a contract requires you to notify before a date, the certificate proves the sending to the second.

Protect your intellectual property

When you send designs, quotes or projects, you certify that your work came from you and when.

Admissible where it matters

Technological evidence admissible before courts and arbitrations, with the backing of the European eIDAS regulation.

Zero friction for your team

It integrates into the email you already use. One address in copy and that is it: nothing to install, nothing to learn.

Return from the first send

A single certified email can save you a lawsuit, a non-payment or the loss of a client.

Use cases

Any important communication can be certified

From the invoice that accounting sends to the design your studio delivers. If it matters that there is a record of what you sent and when, it is worth certifying it.

Department / areaWhat to certify
Administration and financeInvoices, payment reminders, legal notifications and demands.
Legal and managementContracts, agreements, claims, “cease and desist” and formal communications on time.
SalesProposals, quotes, order confirmations and conditions sent to the client.
Human ResourcesCommunications to employees, hires and terminations, training and internal notices.
Customer serviceResponses to claims, warranty management and shipping confirmations.
Creatives and projectsSending designs, sketches and deliverables with proof of authorship and date.
The backing that gives confidence

Built to hold up as evidence

Each certificate is delivered in a signed and stamped PDF that includes the full email and its attachments, with technology designed to withstand technical verification.

Important: SafeStamper Mail certifies the sending of the message —what, to whom and when—. If you also need a record of receipt or reading by the recipient, the complementary service Safe Stamper Notify covers it.
  • Qualified time stamp in accordance with the European eIDAS regulation (EU 910/2014).
  • Tamper-proof technology: digital fingerprint (hash) of the content and daily audit on the Ethereum blockchain.
  • Full traceability: content, technical headers, recipients, attachments and exact moment of sending.
  • Evidentiary value: certificates admissible in courts and arbitrations.
  • Proven reliability: service operating since 2007, with high availability.
🇲🇽 For users in Mexico

NOM-151 conservation certificate included

If you operate from Mexico, each email sending certification includes, in the same act, the Conservation Certificate of Data Messages in accordance with NOM-151, without contracting a separate provider. A double layer of evidence —the European stamp and the Mexican certificate— over the same evidence.

IntegrityAllows verifying that the data message has not been modified since the certificate was issued.
Technical certain dateAssociates the evidence with a verifiable date and time via a qualified time stamp.
Verifiable conservationDemonstrates that the evidence existed at a given moment and keeps its digital fingerprint.

The NOM-151 certificate is issued through SeguriData, a Certification Services Provider accredited by the Mexican Ministry of Economy. Available for users in Mexico and for organizations from other countries that require it due to their activity in that market.

Plans and getting started

It adapts to your company volume

Start with one-off sends and move to subscription when certifying becomes part of your routine.

Pay per use

Prepaid credits

Ideal to start and certify one-off sends, with no commitment.

  • Certification per credit, whenever you need it
  • Emails up to 5 MB (message + attachments)
  • Same certificate with evidentiary value
See prices
Subscription

Monthly or annual

For recurring use, with more capacity and addresses for your team.

  • Emails up to 15 MB (message + attachments)
  • Additional sender addresses for your team
  • Designed for recurring volume
See prices

Mass sending or automated integration (API, mailing platforms, ERP)? The sales team prepares a tailored solution for your organization.

Talk to sales
Frequently asked questions

Common questions

What does it certify exactly?

The sending of the email: its exact content, the recipients, the attached files and the date and time of sending, with the technical headers. It does not certify that the recipient has read it.

Does it prove that the recipient received or read it?

No. Mail proves the sending. For a record of receipt or reading by the recipient there is the complementary service Safe Stamper Notify.

Do I have to install anything or change my email?

No. It is used with your current email: just put the certification address in copy (CC or BCC) when sending the message.

Do the certifications comply with NOM-151 in Mexico?

Yes. For users in Mexico, each sending certification includes the Conservation Certificate of Data Messages in accordance with NOM-151, issued through SeguriData (PSC accredited by the Ministry of Economy), in the same act and with no additional contracting. Also available for organizations from other countries with activity in that market.

What evidentiary value does it have?

It is technological evidence with evidentiary value, built with a qualified eIDAS time stamp and a digital fingerprint. Its assessment corresponds, like any evidence, to the body that analyzes it.

What is the maximum email size?

Up to 5 MB with prepaid credits and up to 15 MB with subscription, counting the message plus the attachments.

Can I automate the certification?

Yes. You can automatically certify everything sent from specific corporate addresses, or integrate it with your mailing platforms and ERP.

The email you send today may cost you a payment or a lawsuit tomorrow

With SafeStamper Mail, every send is shielded for less than the cost of a single consultation with your lawyer.

Certify my first email See plans and prices

SafeStamper Mail is a service of Safe Creative, a global certifier and trusted third party. Certificates are technological evidence with evidentiary capacity; their assessment depends on the context, jurisdiction and judgement of the body or party analyzing them, and they do not replace legal advice when necessary.

2026 Safe Creative.