What evidence should support an e-signed document?

Electronic signatures are widely accepted across the UK, but their legal validity doesn’t rest on the signature alone. In practice, what matters most is the evidence behind the signature.

If a document is ever challenged (whether in court, by a regulator or during an audit) the question won’t be “was this signed?” It will be “can you prove how it was signed, by whom, and under what conditions?” That’s where supporting evidence becomes critical.

Why evidence matters more than the signature itself

At a surface level, an electronic signature confirms intent. But on its own, it offers limited protection. In regulated environments especially, organisations are expected to demonstrate:

• Who the signatory was
• That they intended to sign
• That the document wasn’t altered
• That the process followed was secure and compliant

Without this supporting context, even a legally valid signature can become difficult to defend. This is reflected in UK legal guidance, where the enforceability of an electronic signature often depends on the reliability and integrity of the surrounding process, not just the act of signing itself.

The core components of a defensible evidence set

To stand up to scrutiny, an e-signed document should be supported by a clear and structured evidence trail. While the exact requirements may vary by industry, most robust processes include a combination of identity, activity and document-level data. Typically, this includes:

• Identity verification data: Evidence that confirms the signatory’s identity, such as document checks, biometric verification or multi-factor authentication. This is especially important in preventing impersonation and fraud.
• Audit trail of the signing process: A detailed, time-stamped record of every step taken from document access through to completion. This should include actions like when the document was opened, reviewed and signed.
• Authentication methods used: Records of how the signatory was authenticated, such as biometric checks, knowledge-based questions, one-time passcodes (OTPs), email verification or secure login credentials.
  Document integrity controls: Proof that the document has not been altered after signing. This is often achieved through tamper-evident technology or cryptographic sealing.
• Witness and attestation data (where required): For documents like deeds, evidence that a witness was present and properly recorded is essential for legal validity.

Regulatory expectations - more than just best practice

The need for strong evidence is becoming increasingly important as a regulatory expectation. In conveyancing, for example, HM Land Registry requires a detailed evidence pack under Practice Guide 82, capturing the full signing process from identity verification through to witnessing and completion.

Similarly, under the FCA’s Consumer Duty, firms must be able to demonstrate that customers have understood and engaged with the process appropriately rather than simply provide a signature. This reflects a broader shift that regulators are focusing less on the outcome (a signed document) and more on the quality and transparency of the journey that led to it.

Common gaps that create risk

Despite this, many organisations still rely on fragmented or incomplete processes. It’s not uncommon to see signature tools used without integrated identity verification and limited or inaccessible audit trails. On top of this, you can also see evidence stored across multiple systems with no clear linkage and manual processes that are difficult to evidence consistently. 

These gaps can create significant risk, particularly when documentation is challenged. Without a clear, consolidated evidence set, proving compliance becomes far more difficult and time-consuming.

Building a stronger, more compliant process

To reduce risk, organisations are increasingly moving towards more integrated approaches. Rather than treating identity verification, signing and record-keeping as separate steps, they are bringing them together into a single, evidenceable workflow.

This ensures that every stage of the process is captured and connected, making it far easier to retrieve evidence when needed, demonstrate compliance to regulators and defend against disputes or claims. It also improves internal efficiency, removing the need to piece together evidence from multiple sources.

Making evidence a built-in part of your process

As expectations continue to evolve, the ability to produce clear, reliable evidence is becoming just as important as the signature itself.

By embedding evidence capture into the signing journey organisations can significantly reduce risk while strengthening trust with customers and regulators alike.

Platforms like Bonafidee are designed with this in mind, combining identity verification, secure signing and automated evidence packs into a single, end-to-end process. The result is not just a signed document, but a fully evidenceable transaction that can stand up to scrutiny when it matters most. Download our guide below to find out more.