Send the contract, each party signs with an email link and an SMS code, and you keep the signed contract together with its evidence report.
To sign a contract online, upload it to an electronic signature platform, add each party and send it. Each signer accepts and signs from their phone or computer, and you end up with the contract plus proof of who signed and when. It is generally valid, unless the law requires a special form.
It works for commercial and sales contracts, service agreements, non-disclosure agreements or accepted quotes, among others. The useful question is not only whether you can sign online, but what happens if someone later says they did not sign. That is what this page is about.
In Spain, Article 23 of Law 34/2002 sets out three key ideas:
Exceptions: that title does not apply to family and inheritance law contracts. Acts that by law require a public document or the involvement of a notary, registrar or authority are governed by their specific legislation. Some sectors also have their own rules: consult your adviser.
If you contract with companies in other countries, do not assume Spanish law applies. See the legal validity guides by country, paying particular attention to the law governing the contract.
There is more detail on sending in send documents for signature. If you sign many identical contracts with different clients, see bulk sending.
The EU eIDAS Regulation distinguishes three levels. No single one is right for every contract: the amount, the risk, the other party and what the law requires all decide.
| Type | When it usually fits | Its limit |
|---|---|---|
| Simple | Low-risk acceptances and agreements. | It has effect and is admissible as evidence, but if disputed you will have to prove who signed and that the text did not change. |
| Advanced | Contracts where identifying the signer and detecting changes matters (Art. 26). | It is not legally equivalent to a handwritten signature. |
| Qualified | When a law or the other party requires it, or the risk justifies it. | The only one equivalent to a handwritten signature (Art. 25.2). Requires a qualified certificate and a qualified device. |
In SignaSuite you sign with the email link and an SMS code, with no certificate. If your contract requires a qualified signature, tell us before sending it. The full explanation is in the eIDAS electronic signature guide.
In Spain, proof of these documents is governed by Article 326 of the Civil Procedure Act (Law 6/2020, Art. 3). Evidence helps to show what happened, but it does not replace a judge's assessment or fix a badly drafted contract. This page is for information only: for a specific case, consult your adviser.
In Spain, a contract concluded electronically takes effect if there is consent and the other validity requirements are met (Art. 23 of Law 34/2002). There are exceptions, and other countries apply their own rules.
It is a contract concluded by electronic means rather than on paper. If the law requires it to be in writing, in Spain it is enough for it to be in electronic form. What a contract needs in order to be valid does not change: consent and the other validity requirements still apply.
In Spain, Law 34/2002 excludes family and inheritance law contracts from its title on electronic contracting. Those that by law require a public document or the involvement of a notary, registrar or authority are governed by their specific legislation. If in doubt, consult your adviser.
It depends on the contract and the risk. eIDAS does not deny effect to a signature for not being qualified, but only a qualified signature is legally equivalent to a handwritten one. If a contract or a law requires it, talk to us before sending it.
Yes. You add all the signers and decide whether they sign in a specific order or at the same time. Each one receives their link and the dashboard shows who has yet to sign. If they do not sign, you can resend reminders.
No. Signers do not need an account, a subscription or to install anything. Only the company sending the contract needs a paid account.
Tell us how you sign them today and we will guide you
With tracking of each party and evidence of each signature