Use case
Postal Mail Alternative
Send official documents to verified recipients in seconds instead of days — with proof of delivery, identity and time that registered post was invented to provide.
What it is
LetroLetter replaces registered post for official documents. The letter is encrypted on your device, delivered instantly to a recipient verified by PostNumber, and both delivery and receipt are recorded with timestamps you can export as evidence.
Why registered post belongs in Letro
Instant, not days in transit
A LetroLetter reaches the recipient's verified device immediately, in any country.
Proof of delivery, identity and time
Sender and recipient are verified PostNumber holders; delivery and opening are timestamped in a tamper-evident record.
Lower cost, less administration
No printing, envelopes, postage or return-receipt handling. The record is created automatically.
Permanent evidence
Records are retained for 10 years and can be exported when a dispute or audit requires them.
How LetroLetter works
The formality of a letter, the speed of a message.
01
Compose a LetroLetter
Use a formal template or attach the official document.
02
Send to a verified recipient
The recipient is identified by PostNumber, not by a postal address that may be out of date.
03
Delivery is recorded
Delivery and opening are timestamped and added to the audit chain.
04
Keep or export the proof
The record is retained and exportable as evidence of service.
Discuss Your Deployment Model
Whether you need a standard rollout, private infrastructure, or stricter residency and isolation requirements, Letro gives you a trustless foundation for secure client communication.
