Send it. It's certified. You can prove it.
Certified notifications by SMS, email, RCS and WhatsApp; contracts signed from a mobile phone; timestamps and identity verification. Every operation produces an Evidence Record sealed by Mensatek and the FNMT, kept in custody for 10 years and verifiable by any third party.
No monthly fees, no lock-in · credit packs from €10 that never expire
- ISO 27001 · ISO 9001
- 10-year custody included
- Support based in Spain
- Content recorded
- Sent and delivered
- Sealed by two providers
- In custody
supervised in Spain Double seal
Mensatek + FNMT on every certificate ISO 27001 & ISO 9001
independently audited 10-year custody
at no extra cost Spanish engineering
operating since 1998
One balance, eight ways to put things on record
Every service shares the same account, credits, dashboard and API. Start with the one you need today; the rest will be there tomorrow.
Certified SMS
Certified notification that reaches any mobile phone
View serviceCertified Email
Email with certified content, sending and delivery
View serviceCertified RCS
Android rich messaging with an evidential record
View serviceCertified WhatsApp
Entire conversations backed by certified evidence
View serviceSMS Contract
Contracts accepted by replying to a text message
View serviceOnline contracting
Document signing via SMS, email or WhatsApp
View serviceIdentity verification
ID document plus facial biometrics in under a minute
View serviceTimestamping
Certain date and time for any file
View serviceYou communicate; the record builds itself
Send through any channel
SMS, email, RCS or WhatsApp; a notification, a contract or a document to timestamp. From the dashboard, from a spreadsheet or through the API.
Every event is sealed
Content, sending, delivery, reading, reply or signature: each event is recorded the moment it happens, with its own timestamp.
You keep the proof for 10 years
The Evidence Record is sealed by Mensatek and the FNMT, held in custody for a decade and verifiable by any third party.
The Evidence Record: who sent what, to whom, and when
Every operation on the platform ends in the same place: an evidential document that gathers all the proof of the process. This is what it contains and why it holds up.
-
The full content
Text, documents and files, identified by their cryptographic fingerprint: any later alteration would break the verification.
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A sealed timeline
Every event — sending, delivery, reading, reply, signature — carries a timestamp, the time reference with legal backing.
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The double seal
Certificates are sealed by two qualified trust service providers: Mensatek and the FNMT (Spain's Royal Mint).
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Public verification
With the certificate's CSV code, a court, an expert or the other party can check the original in our public verifiers, without asking you for anything.
- Reference
- CERT-2026-081437
- Operation
- Certified SMS notification
- Content
- in full, with SHA-256 fingerprint
- Events
- sent · delivered · sealed with timestamps
- Seals
- ✓ Mensatek · ✓ FNMT
- Custody
- 10 years at no extra cost
- Verification
- public, by CSV code
- Admissibility
- eIDAS Regulation (EU 910/2014) · Spanish Act 6/2020 · Civil Procedure Act arts. 299 & 326
Is the burofax still worth it?
The burofax is Spain's registered postal notification. Same purpose — communicating with reliable proof. Very different experience.
| Certified notification | Burofax | Registered letter | Ordinary email | |
|---|---|---|---|---|
| Approximate cost | from €0.26 | around €23 per sending | around €5 per sending | — |
| Delivery time | seconds | hours or days | days | seconds |
| Proof of content | yes, by a third party | yes | no | no |
| Requires action by the recipient | none | pick-up if absent | pick-up if absent | none |
| Personalised bulk sending | yes, thousands at once | impractical | impractical | yes |
| Certified copy & verification | downloadable certified copy, 10-year online custody and free online verification | paper copy only | a receipt only | no |
Postal costs and times are indicative, based on published tariffs. Functional equivalence depends on each case: for specific legal questions, consult your adviser.
Organisations that have trusted our platform
Two trust service providers on every certificate
Certificates are sealed by two qualified trust service providers: Mensatek — recognised and audited in Spain, listed on the European Commission's trust list — and the FNMT – Real Casa de la Moneda, Spain's Royal Mint. Two independent signatures supporting the same evidence.
You can check the provider's entry on the European Commission's Trusted List and read the official documentation in our Certification Policies & Practices.
Certify from your own software
Everything you see on this site can be triggered from your ERP, CRM or application through a REST API: certified notifications, signatures, timestamps and identity checks, with statuses delivered to your webhook. Using the API costs nothing extra.
# One call = one certified notification
POST /API/v.../EnviaSMSCertificado
{
"Destinatarios": "+34600000000",
"Mensaje": "We hereby inform you…"
}
# webhook → delivered · certificate sealedThe essentials, answered
What is a certified notification?
A communication whose content, sending and delivery are attested by an impartial third party. Here, that third party is a Trust Service Provider that records every event with a timestamp and issues a certificate also sealed by the FNMT: proof of who sent what, to whom, and when.
Is it legally valid?
Yes. The certificates are electronic documents admissible as evidence under the eIDAS Regulation (EU 910/2014), Spanish Act 6/2020 on electronic trust services and articles 299 and 326 of the Spanish Civil Procedure Act. Qualified timestamps also enjoy a legal presumption of accuracy (art. 41.2 eIDAS).
How much does it cost?
It runs on prepaid credits that never expire, from €10 and with no fees: a certified SMS or email costs between €0.26 and €0.39, an online contract between €0.41 and €0.60 and a timestamp from €0.029. Every rate is published on the pricing page.
How is it different from a burofax?
It serves the same evidential purpose as Spain's registered postal notification, but it is delivered in seconds to the recipient's phone or inbox, costs a fraction, supports personalised bulk sending and its certificate can be verified online for 10 years. See the full comparison above.
I received a certified notification — what should I do?
No need to worry: we explain everything on a page written for recipients, including how to verify the certificate and understand your options.
How do I get started?
Create your account in a minute (free, no lock-in), top up a pack from €10 and send your first certified notification today. If you would rather see it first, call us on +34 910 606 161.
Your next important communication, with proof
A free account in one minute, published pricing and a real team on +34 910 606 161. That is how it starts.