Electronic, digital and notarized signatures are three different levels of proof. An electronic signature is a general term for any electronic means that indicates a person's consent, such as clicking a button after a verification code. A digital signature is a type of electronic signature that relies on a digital certificate and encryption to bind the signature to the signer's identity and reveal any later change. A notarized document, on the other hand, is one approved by a competent official authority through its own authentication procedures. The type of document and its risk determine which of these levels fits it.

We are writing this article for legal teams and operations managers who need a practical decision: which signature level should we use for each type of document? We explain the differences between the three levels, provide a decision table by document type, and cover the common mistakes in choosing.

Quick summary

• Electronic signature is a broad umbrella, the digital signature is one of its types and the strongest technically, and official notarization is a different procedure handled by competent authorities.
• A signature's evidentiary strength depends on identity verification, binding the signature to its owner, tamper detection and the audit trail.
• Some documents only need verification codes, some need verification through the national identity and a digital signature, and some can only be completed through official notarization platforms.
• Choosing the level is a decision that matches the document's value and risk to the required strength of proof, not just a technical decision.
• At Signit, we operate as a trust service provider licensed by the Digital Government Authority, and we offer multiple verification levels, from verification codes to Nafath.

What is the difference between electronic, digital and notarized signatures?

The core difference lies in the strength of proof and how it is achieved: an electronic signature proves consent to varying degrees, a digital signature adds a cryptographic binding to identity and tamper detection, and official notarization adds the approval of a competent authority.

Under the Electronic Transactions Law, an electronic signature is electronic data linked to a transaction that indicates the signer's identity and consent. It covers many methods, from pressing an "I agree" button after a code sent to a mobile phone, to drawing a signature on the screen.

A digital signature is an electronic signature built on public key infrastructure, where the person signs with a private key linked to a digital certificate issued by a certification authority. Any change to the document after signing invalidates the verification. For details, see the article The difference between digital and electronic signatures.

A notarized document is a document approved by a competent official authority under its own procedures, such as authenticating employment contracts through the Qiwa platform, or powers of attorney and declarations at the Ministry of Justice. This is not so much a higher level of signature as a different path governed by the regulations of the competent authority.

What determines a signature's evidentiary strength?

A signature's strength is determined by four elements: how strongly the signer's identity is verified, whether the signature is linked to its owner alone, whether any later change can be detected, and how complete the audit trail is.

In any dispute, the questions are: Is the signer the person concerned? Did they sign of their own free will? Has the document remained unchanged? A signature that answers these questions with clear evidence is stronger as proof. That is why a simple electronic signature with verification through Nafath and a complete audit trail can be stronger in practice than a signature drawn on screen without verification.

Licensing adds another dimension. When the service is provided by a licensed trust service provider under the Digital Government Authority, the evidence rests on a local regulatory framework. For the technical difference between a certificate and a signature, see the article The difference between a digital signature and a digital certificate.

When should you use each level?

Use the level that matches the document's value, risk and regulatory requirements: verification codes for low-risk documents, verification through the national identity and a digital signature for important contracts, and official notarization platforms for whatever the law requires to be notarized.

Electronic signatureDigital signatureOfficial notarization

How does official notarization work alongside electronic signatures?

Official notarization runs on its own path, and electronic signatures complement it for the remaining documents. An employment contract is authenticated through the Qiwa platform, which has seen more than 12 million employment contracts authenticated electronically, while the accompanying confidentiality agreement and policy acknowledgments are handled with internal electronic signatures. Neither path replaces the other.

What does Signit provide for each level?

At Signit, we offer multiple verification levels that organizations choose from based on the document's sensitivity, with a unified audit trail for all signatures.

In electronic signature, we verify signers through Nafath, Absher and Wathq, or with verification codes via email, SMS and WhatsApp. We operate as a trust service provider licensed by the Digital Government Authority, host data inside the Kingdom, and provide an audit trail that records who signed, when and from which device. Signers can complete their signature in under 30 seconds without creating an account.

What are the common mistakes in choosing a signature level?

The most common mistake is using a single level for all documents. Applying the highest level to every simple acknowledgment slows work down and frustrates signers, while applying the lowest level to every contract weakens proof when it matters. The better approach is to match the level to the risk of each category.

Another is confusing a signature image with a digital signature. Placing a signature image on a PDF file does not make it a digital signature, because it is not linked to a certificate and does not detect changes. This confusion leads some organizations to believe they are protected when they are not.

Some teams make the mistake of using electronic signatures for documents that the law requires to be notarized by an official authority. These documents can only be completed through the competent authority's procedures, however strong the electronic signature.

Finally, it is sometimes overlooked that a signature's strength does not prove the signer's authority. A digital signature proves that a given person signed, but their authority to bind the organization is governed by the delegation of authority matrix and mandates.

How do you define signature levels in your organization?

Start by listing documents and classifying them by risk and regulatory requirements, then set the level for each category and document it in an internal policy.

To connect signature levels to end-to-end contract management, see the article Contract management from draft to archive.

Frequently asked questions

Conclusion

Not all signatures are equal, and the right question is not "Which signature is stronger?" but "Which signature fits this document?". Simple acknowledgments only need verification codes, important contracts need verification through the national identity and a digital signature, and whatever the law requires to be notarized goes through the competent authorities. An organization that documents this decision in a clear policy gets speed where it is enough, and strong proof where it is needed.