Registered Email
The email that proves sending, delivery and content.
An electronic registered delivery service under Article 43 of the eIDAS Regulation: proof of sending, delivery, date and time and integrity of the content, with a qualified timestamp. Admissible in court across the European Union.
- Art. 43 eIDAS
- Qualified timestamp
- Admissible in court

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What it is
Proof of sending and delivery, admissible in court.
Every message sent as Registered Email generates sealed evidence, with a qualified timestamp, proving who sent it, to which address it was delivered, when, and that the content was not altered. If the message is refused or cannot be delivered, that is recorded too. It is the digital alternative to the registered letter: immediate, with proof of the content sent and at a fraction of the cost.
Sealed proof
A certificate for every message, with the date and time attested by a qualified timestamp.
Delivery on record
Delivery is recorded in sealed evidence, with date and time. So are refusal and non-delivery.
Stands up in court
Admissible as evidence in any court in the European Union.
Backed by law
Article 43 of the eIDAS Regulation and Decree-Law 12/2021.
Comparison
The same proof. No trips to the post office.
Proof of sending, delivery and content, without queues, without paper and without waiting days.
| Criterion | Registered mail with receipt | Registered Email |
|---|---|---|
| Proof admissible in court | Yes | Yes |
| Proof of delivery | To the addressee, by the acknowledgement of receipt | To the destination server, in sealed evidence |
| Proof of the content sent | No | Yes |
| Delivery time | Days | Instant |
| Cost per item | High | A fraction |
| Trip to the post office | Required | None |
| Archive and search | Analogue | Digital |
When it makes a difference
For communications that need proof.
Whenever you need to demonstrate, with evidence admissible in court, that a message was sent and delivered.
Law firms
Formal demands, notifications and communications with evidential value, without trips to the post office.
Insurance
Communications with policyholders and third parties, with immediate proof of sending and delivery.
Real estate
Lease terminations and contractual communications with a sealed date.
Property owners' associations and companies
Meeting notices and communications between shareholders or co-owners, admissible in court.
Utilities
Customer notifications (water, energy, telecoms) with proof of delivery.
Procedures
Contract termination and breach notices, with a certificate and qualified timestamp for every message.
Do the maths
Two registered letters a week already cost more than this.
A registered letter with acknowledgement of receipt costs between €3 and €5, plus printing, the envelope and the trip to the post office. Registered Email costs €27.50 per user/month. If your company sends more than two registered letters a week, you are paying more for the old process, and waiting days for what is proven here in seconds.
How it works
Three steps, no hassle.
The experience is that of a normal email: the legal proof happens behind the scenes.
Write as usual
The message is composed in webmail and the Registered Email option is switched on before sending.
Sooma seals the message
A certificate is generated with the sender, recipient, content, date and time, attested by a qualified timestamp.
The proof remains
The proof of sending and, later, of delivery or non-delivery is made available, admissible in court.
Frequently asked questions
Questions about the evidence
What lawyers, managers and property managers ask us before signing up.
Does Registered Email count as evidence in court?
Yes. It is an electronic registered delivery service under Article 43 of the eIDAS Regulation: data sent and received cannot be denied as evidence in court on the grounds that it is in electronic form. The date and time of each message are attested by a qualified timestamp, which carries a presumption of accuracy. Decree-Law 12/2021 regulates these services in Portugal.
Is it equivalent to registered mail with acknowledgement of receipt?
It is not equivalent: the formal equivalence to registered mail laid down in Portuguese Decree-Law 12/2021 applies to qualified services. Registered Email is an electronic registered delivery service under Article 43 of eIDAS: it proves who sent the message, to which address, when, with what content and that it was delivered to the destination server, with a qualified timestamp, and that evidence is admissible in court. It also has what registered mail does not: proof of the content sent, immediately, with no trips to the post office and at a fraction of the cost.
Does the recipient need a Sooma account?
No. It works with any recipient; the delivery evidence is generated by the service.
And if the recipient doesn't open the message?
The evidence proves sending and delivery to the recipient's server, with a sealed date and time, regardless of whether the message is opened. Reading is not proven, just as the acknowledgement of receipt of a letter does not prove it was read.
Can I use Registered Email only occasionally?
Yes. Registered sending is switched on message by message; the rest of the company's email works as usual.
How much does it cost?
The Registered Email plan includes a 50 GB mailbox and a delivery certificate with a qualified timestamp for €27.50 per user/month. See the pricing page for details.
Replace physical registered mail.
The same proof, immediately and at a fraction of the cost. 60-day guarantee: your money back, no questions asked.
