SMSverifica help · section 8 of 18
8. Certified messaging: when you need to be able to prove it
A certified message is not an SMS with decoration: it is an evidence record. When you send it:
- The full content is fixed with a cryptographic fingerprint (SHA-256) before it goes out.
- Every event — sending, acceptance, delivery, opening of the link, reading of the content, signature if you request it — is recorded with a date and time to the millisecond, chained to the previous event.
- The recipient receives an SMS with a link to their portal, where they read the full content (and sign with a one-time code, if it is a contract).
- The evidence PDF is issued when you request it and is closed with a qualified electronic time stamp from AC Camerfirma, S.A. (art. 42 of the eIDAS Regulation), with a legal presumption of accuracy of date and integrity (art. 41.2). It carries a public verification code: anyone can check the certificate without an account.
The limits, up front: available only to Spain (+34); it is a non-qualified electronic registered delivery service (art. 3.36 eIDAS) — what is qualified is the time stamp —; and the final assessment of the evidence is always the judge's. The full legal detail, with its citations, is at smsverifica.com/mensajeria-certificada.html.
Price: the channel price + €0.25 surcharge for certification (the same across all three channels).