Without a policy, fee-earners make inconsistent decisions about signature level, authorisation and evidence retention. That creates uneven risk, weak defensibility and avoidable disputes over whether the signing method was appropriate. The problem is not the technology itself, but the absence of standardised governance around when and how it should be used.
What fails first when signatures are allowed without a policy?
The first failure is not cryptography, it is decision consistency. Without a policy, different teams will choose different signature levels, approval thresholds and retention practices for the same kind of matter, which makes the organisation harder to defend when a signature is later challenged. The technology can work perfectly while the governance around it becomes fragmented.
That inconsistency also creates uncertainty about evidential value. If one matter uses a basic electronic signature, another uses a stronger method, and a third keeps no supporting record of who approved what and why, the organisation cannot show a repeatable standard. In practice, that weakens trust in the process even before any dispute arises.
Why does the absence of policy create legal and operational risk?
A signature policy turns a technical signing method into an auditable business rule. It tells fee-earners when an electronic signature is acceptable, what authority must exist before use, and what evidence must be retained to support the act of signing. Without those rules, the organisation invites disputes over whether the signature was appropriate for the transaction or the risk level.
That matters because signature practice is not only about consent or convenience. It is also about accountability, delegation and proof. When the firm cannot demonstrate that the signer had the right level of authority and that the record was preserved in a consistent way, an otherwise routine execution step can become a credibility problem in review, dispute resolution or later challenge.
What a usable policy needs to standardise
A workable policy should define the decision points that people otherwise improvise. It should make clear which matters can use electronic signatures, which require stronger authorisation, what supporting evidence must be captured, and how long that evidence must be retained. That is especially important where different fee-earners, matter teams or offices may otherwise apply their own judgment.
The policy should also distinguish between the signing method and the surrounding control environment. A compliant process usually depends on more than the signature event itself: it needs identity checks, approval discipline, recordkeeping and a clear ownership model for exceptions. When those elements are standardised, the organisation can treat electronic signatures as a governed process rather than an ad hoc convenience.
Risk and Threat Considerations
Without policy, the main risk is inconsistent authority and weak evidence, which creates avoidable exposure if a signature is disputed or if the matter needs to withstand later scrutiny. The problem often appears as process drift: one team accepts a method that another would reject, and no one can prove that the same standard was applied everywhere.
Failure mechanism: The organisation allows local judgment to replace a common rule set, so signature level, authorisation and retention are decided case by case without a defensible baseline.
Impact: This can undermine enforceability, weaken internal accountability and force the organisation to rely on recollection rather than records when a signature is questioned.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST SP 800-53 Rev 5 sets the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| ISO/IEC 27001:2022 | A.5.1 — Policies for information security | Policy governance is central to standardising electronic signature use. |
| A.5.15 — Access control | Signature authority depends on who is allowed to approve and sign. | |
| A.5.33 — Protection of records | Evidence retention is needed to defend the signature process later. | |
| Recommendation — Define a signing policy that standardises approval, evidence and retention rules. Restrict signing authority to approved roles and delegated approvers. Retain signing records so authority and intent can be demonstrated later. | ||
| NIST SP 800-53 Rev 5 | AC-6 — Least Privilege | Signature authority should be limited to only the people allowed to sign. |
| AU-11 — Audit Record Retention | The question turns on retaining evidence that can withstand later challenge. | |
| Recommendation — Limit signing rights to the minimum roles needed for each matter type. Retain signature audit evidence for the period needed to defend the action. | ||
Practitioner Guidance
What to verify: Confirm that the policy does not just approve “electronic signatures” in the abstract, but defines which matter types, approval paths and evidence requirements apply to which signing scenarios. If staff cannot explain the rule without improvising, the policy is too vague to rely on.
Decision rule: If a matter could later be challenged on authority or intent, require the signature process to produce a clear approval trail and retention record, not just a completed signing action. Where that cannot be guaranteed, treat the signing method as under-governed and escalate for review.
Practitioner takeaway: The key control is not the signature platform, it is the governed decision framework around it, because that is what turns an acceptable signature into one the organisation can defend.
Related resources from NHI Mgmt Group
- What breaks when e-signatures are used without strong signer verification?
- What breaks when remote onboarding relies on electronic signatures without qualified identity assurance?
- What breaks when VMCs are used without strong DMARC policy?
- How should security teams govern API keys used for generative AI access?
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Reviewed and updated by the NHIMG editorial team on October 21, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org