Electronic Signature Service Terms

Sign HUB

Last updated: 4 May 2026

These Terms govern the electronic signature service provided through the Sign HUB Platform, owned by HUB DESPACHOS Y PYMES, S.L. (CIF B76816875). By signing a document, the user expressly accepts these Terms.

1. Legal nature of the signature performed

The service applies to each signed document:

• A simple electronic signature of the signer (Art. 3.10 of Reglamento (UE) 910/2014, eIDAS), implemented by means of: identification by email, verification with a one-time password (OTP), a digitized handwritten signature and the express acceptance of the required consents.
• A qualified electronic seal of the provider (Art. 36 eIDAS), applied by HUB Consultores with a qualified seal certificate issued by a qualified trust service provider included in the EU Trusted List.
• An RFC 3161 time stamp, applied when the Time Stamping Authority service responds successfully and embedded in the PAdES signature. If the service does not respond, the document retains the qualified seal and its traceability evidence, without a third-party time stamp.

Pursuant to Article 25.1 eIDAS, "an electronic signature shall not be denied legal effect and admissibility as evidence in legal proceedings solely on the grounds that it is in an electronic form or that it does not meet the requirements for qualified electronic signatures".

Important clarification

Unless the user expressly uses their own qualified certificate (not included in the standard service), the signature performed does NOT constitute a "qualified electronic signature" of the signer within the meaning of Articles 3.12 and 25.2 eIDAS. The legal equivalence to a handwritten signature provided for in Article 25.2 eIDAS applies only to the qualified electronic signature.

Nevertheless, the set of measures applied (identification of the signer, integrity guaranteed by a qualified seal, time stamping when available, traceability evidence and object-lock retention) gives the signature evidentiary weight before the Spanish courts. Pursuant to Article 326.1 of the Ley de Enjuiciamiento Civil (Spanish Civil Procedure Act), it constitutes full proof as a private document if its authenticity is not challenged. If the counterparty challenges its authenticity (Art. 326.2 LEC), the burden of proving it shifts to the party that submitted it, and the evidence gathered (hash, IP address, OTP, time stamp, traceability certificate) serves as a means of proof whose weight is assessed by the court.

2. Identification of the signer

The signer is identified by means of:

• Receipt of the personal, non-transferable link at the email address designated by the client sending the document.
• Verification of a one-time password (OTP) sent to that email address.
• Completion of the identification details by the signer (full name and, optionally, DNI/NIF — Spanish ID number).
• Collection of the digitized handwritten signature and of the IP addresses, user-agent and timestamp.

The signer declares that the details provided are truthful and that they are the legitimate addressee of the document. Use of the link by a person other than the addressee constitutes unauthorized use of the service.

3. Signed document and evidence

After the signature, HUB Consultores generates and retains:

• The signed PDF document with a qualified electronic seal, in PAdES format, including a time stamp whenever the Time Stamping Authority service responded successfully.
• The certificate of electronic evidence, which includes the signer's name, IP address, date/time, SHA-256 hash of the original and signed document, consents accepted and details of the seal certificate.
• The public verification code allowing any third party to check the authenticity and integrity of the document from the Platform's home page.

4. Retention

The signed document and its evidence are retained for a minimum of 5 years under an object-lock (WORM) retention policy (WORM system, Object Lock COMPLIANCE), when the storage backend supports it, which prevents their modification or deletion, even by the Owner itself, during that period.

5. Service limitations

• In its standard version, the service does not provide enhanced identification by video identification, identity document reading or signature with the signer's own qualified certificate.
• HUB Consultores is not responsible for the truthfulness of the identification details entered by the signer or for the legitimacy of whoever accesses the link received by email.
• The client sending the document (responsible for the sending) determines the addressee and the purpose of the document; HUB Consultores acts as the provider of the technical signature service.

6. Express acceptance

By clicking "Sign document" and ticking the acceptance boxes provided, the signer declares that:

1. They have read and accept these Electronic Signature Service Terms.
2. They have read and accept the Privacy Policy and the Cookie Policy.
3. They give their express and unequivocal consent to sign the document presented to them electronically and to the generation and retention of the associated evidence.
4. They are aware that this signature has evidentiary weight before the courts pursuant to Reglamento (UE) 910/2014 (eIDAS) and the Ley de Enjuiciamiento Civil (Spanish Civil Procedure Act), amounting to full proof if its authenticity is not challenged (Art. 326.1 LEC).

7. Contact and complaints

Any enquiry or complaint regarding the signature performed may be addressed to [email protected].