Electronic Registered Mail: the Complete Guide
eIDAS legal framework, legal value, step-by-step operation, comparison with postal registered mail. Everything you need to know to send your first electronic registered mail with confidence.
What is electronic registered mail?
Electronic registered mail is the digital equivalent of postal registered mail with acknowledgement of receipt. It lets you send documents to a recipient electronically, with proof of sending and receipt enforceable in court.
In practice, instead of printing a document, going to the post office and waiting several days, you upload your files to an online platform. Your recipient receives an email inviting them to sign an electronic acknowledgement of receipt. Once signed, they access the document and you hold legally valid proof of receipt.
Electronic registered mail rests on trust mechanisms defined by the European eIDAS Regulation: a Qualified Electronic Timestamp and an electronic signature on the acknowledgement of receipt by the recipient. These technologies guarantee the integrity of the document, the identification of the recipient and the certification of the date and time.
The legal framework: the eIDAS Regulation
Electronic registered mail is not merely a technological convenience: it is a service governed by European legislation.
The eIDAS Regulation (Electronic IDentification, Authentication and trust Services), adopted on 23 July 2014, is the founding text. Directly applicable in the 27 Member States of the European Union, it harmonises the rules on digital trust services, including electronic signatures and electronic registered delivery.
Article 44 — The requirements for qualification
Article 44 sets out precisely what an electronic registered delivery service must meet to be qualified:
- The service must be provided by a qualified trust service provider (QTSP)
- The sender and the recipient must be identified with a high level of confidence — which generally implies formal identification of the KYC or eID type
- The sending and receiving of data must be secured by an advanced electronic signature or seal
- Any modification of the data must be clearly indicated
- The date and time of sending and receipt must be indicated by a qualified electronic timestamp
Articles 41 and 43 — The three levels of legal value
⚖️ Article 43.1 — Admissibility for all
Electronic registered mail, even when not qualified, cannot be denied legal effect solely because of its electronic form. It is admissible as evidence before the courts of all Member States.
⚖️ Article 41 — The timestamp’s own presumption
A Qualified Electronic Timestamp benefits from a presumption of accuracy of the date and time it indicates, and a presumption of integrity of the data to which it is linked. This presumption is standalone: it applies as soon as a qualified timestamp is affixed, whether or not the registered delivery service itself is qualified.
⚖️ Article 43.2 — Full presumption (fully qualified services)
Services meeting all the requirements of Article 44 benefit from a legal presumption covering the integrity of the data, the sending by the identified sender, the receipt by the identified recipient and the accuracy of the dates. This full presumption is reserved for fully qualified services.
⚠️ e-Signature.eu’s positioning
e-Signature.eu is not a fully qualified service within the meaning of Article 44: formal identification of the sender through KYC or eID imposes costs and constraints that generally translate into a subscription model.
The approach is different: integrating the most decisive qualified components into an accessible, subscription-free service. In concrete terms, your registered mail is admissible as evidence throughout the EU (Article 43.1), and the Qualified Electronic Timestamp applied to your document benefits from its own legal presumption (Article 41).
For situations requiring a fully qualified service — such as ANSSI-qualified LRE in France — a provider certified for that specific service is necessary.
Qualified or non-qualified: what’s the difference?
The eIDAS Regulation distinguishes two levels of electronic registered mail, and the difference matters.
| Criterion | Non-qualified registered mail | Qualified registered mail (Article 44) |
|---|---|---|
| Requirements | No formal requirement | All the requirements of Article 44 |
| Provider | No mandatory certification | Certified and audited QTSP |
| Admissibility in court | ✅ Yes (Article 43.1) | ✅ Yes |
| Presumption linked to the timestamp | ✅ Yes, if a Qualified Electronic Timestamp is applied (Article 41) | ✅ Yes |
| Full legal presumption | ❌ No — judge’s assessment | ✅ Yes (Article 43.2) |
| Postal equivalence | ❌ Not recognised | ✅ Recognised in certain countries (e.g. France) |
💡 The middle ground that counts
Between a “basic” send (a simple email with a read receipt) and a fully qualified service, there is an intermediate level: a service that integrates qualified components. A Qualified Electronic Timestamp issued by a certified QTSP gives the document a presumption of date and integrity (Article 41) that a plain email will never have — even without full qualification of the service.
How does electronic registered mail work?
The process rests on two complementary mechanisms which together create a complete chain of trust.
🔏 The Qualified Electronic Timestamp
The Qualified Electronic Timestamp is a certificate issued by a Qualified Trust Service Provider (QTSP) attesting to the exact date and time at which your document was created. It is the digital equivalent of a notarised date stamp.
It proves two things: that your document existed on the stated date, and that its content has not been modified since. The timestamp embeds a unique digital fingerprint (SHA-256 hash) of your document. If someone tries to modify the document after sending, the fingerprint no longer matches and the timestamp becomes invalid, making tampering immediately detectable.
✍️ The signed acknowledgement of receipt
The acknowledgement of receipt is a document generated automatically containing the Qualified Electronic Timestamp details, the digital fingerprint (hash) of the document sent, the details of the sender and recipient, and the legal notices on consent.
The recipient must sign this acknowledgement of receipt with an eIDAS-compliant electronic signature in order to access the registered document. This signature constitutes both the proof of receipt and the recipient’s explicit consent.
🔒 Dual protection
Your document is protected by two complementary mechanisms: the Qualified Electronic Timestamp (proof of when and what) and the signed acknowledgement of receipt (proof of received by whom). Any modification of the document invalidates the timestamp, making tampering immediately detectable.
📋 The Audit Trail
A third element completes the evidence file: the Audit Trail. This timestamped log automatically records every step of the registered mail — creation, invitation sent, automatic reminders, viewing, signature of the acknowledgement of receipt or explicit refusal by the recipient. It is consultable in real time from your dashboard and downloadable as a PDF once the procedure is finalised. It is included at no extra cost.
The 3-step process on e-Signature.eu
1 Merge & Convert
You upload your documents in any format (Word, Excel, PDF, images…). The platform automatically merges them into a single secure PDF file.
2 Document protection
A Qualified Electronic Timestamp is automatically applied to your document, with no action on your part. It certifies the sending date and protects the content against any modification.
3 Acknowledgement of receipt
Your recipient receives an email inviting them to sign the acknowledgement of receipt. Once signed, they access the document and you receive your legally valid proof of receipt.
Electronic vs postal registered mail
Electronic registered mail offers guarantees comparable to postal registered mail, with significant practical advantages.
| Criterion | Postal registered mail | Electronic registered mail |
|---|---|---|
| Delivery time | 1 to 5 business days | Instant |
| Cost | €5 to €10 (varies by weight) | For less than €2 excl. VAT |
| Travel required | Yes (post office) | No (from your computer) |
| Accepted formats | Paper only | All digital formats |
| Proof of sending | Deposit receipt | Qualified Electronic Timestamp (certified date + integrity) |
| Proof of receipt | Paper acknowledgement of receipt | Digitally signed acknowledgement of receipt |
| Content integrity | Not verifiable (sealed envelope) | Guaranteed by the SHA-256 hash |
| Keeping the proof | Physical (risk of loss) | Digital (downloadable) |
| Reminders | Not possible | 3 automatic reminders every 4 days |
| Traceability | Limited postal tracking | Complete timestamped Audit Trail |
| Deadline if unclaimed | 15 days held at the post office | 15 days before expiry |
| Legal value | Recognised | Admissible throughout the EU (eIDAS framework) |
| Environmental impact | Paper, transport | Zero paper, zero transport |
💡 When is postal registered mail still preferable?
Postal registered mail remains essential for recipients without an email address, for sending physical originals, and for certain judicial or administrative procedures that still explicitly require it in some countries — notably in Belgium, where bpost retains a partial monopoly for those procedures.
Electronic registered mail vs email with read receipt
Electronic registered mail should not be confused with the “read receipt” function in email software. The two have nothing in common.
A standard email with a read receipt provides no legal guarantee. The recipient can decline the receipt, and nothing proves the content has not been modified. In a dispute, a plain email carries very limited evidential weight.
Electronic registered mail brings three guarantees an email cannot offer:
- 🔒 Proof of receipt: the recipient signs an acknowledgement of receipt with an eIDAS electronic signature — they cannot access the document without doing so
- 🔒 Certified integrity: the Qualified Electronic Timestamp protects the content against any alteration and carries a legal presumption (Article 41 eIDAS)
- 🔒 Traceability: the timestamped Audit Trail documents every step, including reminders and any refusal by the recipient
Main use cases
Electronic registered mail is the natural choice in every situation where you need legally valid proof of receipt:
⚖️ Formal notices
You need to prove that your debtor received your formal notice on a specific date. Electronic registered mail gives you that proof instantly, without going through the post.
📄 Contract terminations
Lease, insurance, subscription, commercial contract: where termination must be notified by registered letter, electronic registered mail is a legal alternative in most contractual contexts.
📢 Official notifications
General meeting convocations, share transfer notifications, denunciation of contractual clauses: all these formal communications between parties can be digitised. Each registered item addresses a single recipient — so count one send per shareholder.
📎 Contractual documents with proof of receipt
Sending updated general terms, disputed invoices or contract amendments: electronic registered mail proves the recipient received the document.
👥 Employer/employee communications
Warnings, employment contract amendments, notifications of disciplinary procedures: where employment law permits, electronic registered mail simplifies and speeds up these formal exchanges.
Signature methods for the acknowledgement of receipt
The recipient signs the acknowledgement of receipt with an eIDAS-compliant electronic signature. You choose which method or methods to allow, depending on the level of identification you want.
| Method | Type | Coverage | Cost | Recommended for |
|---|---|---|---|---|
| OTP email | Simple Signature (SES) | Worldwide | 0.4 credit | Most routine sends |
| Veriff | Advanced Signature (AES) | 198 countries | 0.7 credit | Stronger identity verification |
| itsme® | Qualified Signature (QES) | 32 European countries | 1 credit | Mandatory formal identification |
| Evrotrust | Qualified Signature (QES) | 62 countries | 1 credit | Formal identification, international coverage |
💡 Which method to choose?
The OTP method suits the vast majority of cases. It confirms that the person holding the email address signed the acknowledgement of receipt, which is enough for most registered communications.
Advanced (Veriff) or qualified (itsme®, Evrotrust) methods are justified when the nature of the registered mail calls for formal identification of the recipient that is hard to challenge: formal notice, termination of a contract with high legal stakes, official notification.
If you offer several methods, your recipient will choose the one that suits them best and you will only be charged for the method actually used.
What happens if the recipient does not sign?
Two situations can arise, and in both your proof of sending is preserved.
The deadline expires
If the recipient does not sign the acknowledgement of receipt, the procedure stops automatically after 15 days. During that period, 3 automatic reminders are sent to them by email, 4 days apart.
The recipient refuses
The recipient may also explicitly refuse the registered mail. This refusal is timestamped and recorded in the Audit Trail — exactly like a refusal of delivery at the post office counter.
⚠️ In both cases
The registered document is not transmitted to the recipient. Access to the content is conditional on signing the acknowledgement of receipt.
You nonetheless keep all your proof of sending: the Qualified Electronic Timestamp on the document, proof that the invitation was sent, the record of the reminders, the timestamped refusal where applicable, and the complete Audit Trail.
Electronic registered mail cannot be cancelled once sent. The timestamp is applied at the moment of sending, guaranteeing the integrity of the process. Check your documents and the recipient’s details carefully before confirming.
How much does electronic registered mail cost?
On e-Signature.eu, the cost depends on the signature method chosen for the acknowledgement of receipt. The rates are identical to those for electronic signatures.
| Method | Type | Cost | Price at standard rate | Price at 100+ credits rate |
|---|---|---|---|---|
| OTP email | SES | 0.4 credit | €1.98 | €1.48 |
| Veriff | AES | 0.7 credit | €3.47 | €2.60 |
| itsme® | QES | 1 credit | €4.95 | €3.71 |
| Evrotrust | QES | 1 credit | €4.95 | €3.71 |
💸 A concrete example
Registered mail with an OTP acknowledgement of receipt costs 0.4 credit, i.e. €1.98 excl. VAT at standard rate — and only €1.48 excl. VAT at the 100+ credits rate. That is 3 to 5 times cheaper than postal registered mail.
No subscription, no commitment: you buy only the credits you need. The same credits cover your electronic signatures and your registered mail, at the same rates.
How to send your first registered mail with e-Signature.eu
1 Prepare your send
Give your registered mail a title, enter the recipient’s details (name, email) and upload your documents in any format. Choose which signature method or methods to allow for the acknowledgement of receipt.
2 Pay the credits required
The number of credits is calculated automatically. If your balance is insufficient, buy additional credits.
3 It’s sent!
The platform merges and converts your documents, applies the Qualified Electronic Timestamp and sends the invitation to the recipient. There is nothing more for you to do: you will be notified as soon as the acknowledgement of receipt is signed, and you can follow each step in the Audit Trail.
✅ Total time: a few minutes for your first registered mail!
After that, each new send takes less than 2 minutes to prepare.
Key takeaways
- A solid legal framework: Electronic registered mail is governed by the European eIDAS Regulation. Your send is admissible as evidence in the 27 Member States (Article 43.1), and the Qualified Electronic Timestamp benefits from its own legal presumption of accuracy of the date and integrity (Article 41).
- Dual protection: Your document is protected by a Qualified Electronic Timestamp (proof of date and integrity) and an acknowledgement of receipt signed by the recipient (proof of receipt) — any modification is immediately detectable.
- Complete traceability: The timestamped Audit Trail documents every step, including the 3 automatic reminders and any refusal by the recipient. Consultable in real time, downloadable as a PDF.
- Faster and cheaper: Instant sending for less than €2 excl. VAT, versus 1 to 5 days and €5 to €10 for postal registered mail.
- Conditional access: As long as the acknowledgement of receipt is not signed, the document is not transmitted to the recipient — whether the deadline expires or they explicitly refuse.
- No subscription: Universal prepaid credits, usable for your electronic signatures and your registered mail, at the same rates. No commitment, no waste.
Send your first electronic registered mail
No subscription or commitment required. Universal prepaid credits. eIDAS compliance guaranteed.