They need both. IAM governs how the signer is verified and bound to the act, while records management preserves the evidence that makes the signature defensible later. Splitting those responsibilities creates gaps between execution, proof, and retention, which is exactly where compliance failures emerge.
Why eSignature sits between identity proofing and evidence retention
An eSignature is not just a user interface action or a document artifact. The control has two distinct security jobs: confirm who is allowed to sign, and preserve enough proof to defend the signature later. That makes it a boundary object between access control, authentication, workflow integrity, and records retention, not a single-team control.
When organisations treat the signature flow as only an IAM problem, they may verify the signer but lose the evidence chain. When they treat it as only records management, they may preserve a document without being able to prove who signed, when, and under what assurance level. The practical question is not ownership alone, but which control plane governs each failure mode.
For the identity side, the relevant control is the binding between the person and the act: authentication strength, session assurance, approval authority, and non-repudiation assumptions. For the records side, the relevant control is preservation of the signed record, audit trail, retention rule, and legal admissibility. A good design makes those responsibilities explicit rather than relying on the eSignature platform to “cover everything.”
That split is especially important when the signature evidence must survive investigation, dispute, audit, or legal challenge. The signed PDF, certificate data, event logs, and retention schedule all need to line up. If any of those are owned informally, the organisation can end up with a valid transaction and an unusable record, or a preserved record with weak signer assurance.
What goes wrong when IAM and records teams split the control
The common failure is a handoff gap. IAM teams may manage account verification, MFA, and sign-in policy, while records teams assume the signed file and system log are being retained elsewhere. That gap can break the evidentiary chain even when the signature itself was technically successful.
A second failure mode is control drift over time. Signing assurance often changes as identity proofing methods, delegated signing, and account recovery paths evolve. Records obligations also change as retention periods, legal holds, and system exports are updated. If those changes are governed separately, the organisation may retain the wrong proof or delete the evidence before it is safe to do so.
For identity-heavy deployments, the same logic applies to service workflows and delegated approvals. A signing event may be initiated by one identity, approved by another, and executed by a platform account. If ownership is unclear, later reviewers cannot easily reconstruct the chain of authority. Identity Security Programme Guide is useful here because it reinforces that identity governance must cover human and non-human actors that participate in business-critical workflows.
Evidence handling is also where eSignature systems can become a records-control blind spot. The platform may retain an audit trail, but the organisation still needs to decide which record is authoritative, how long it must be kept, and how it will be exported if the vendor changes or a legal hold is triggered. That is why many programmes map the workflow to both access governance and retention governance rather than treating the signature event as self-contained.
How to assign ownership without losing defensibility
The cleanest operating model is shared ownership with a clear split of responsibilities. IAM should own signer verification, identity lifecycle, authentication policy, and approval authority. Records management should own retention, legal hold, evidentiary preservation, and the definition of the authoritative record copy. The eSignature platform owner should be responsible for producing logs, exports, and retention-compatible evidence formats.
One useful decision rule is this: if the issue is “who can sign and under what assurance,” it belongs with IAM. If the issue is “what proof must remain available later,” it belongs with records management. If the issue crosses both, such as signer auditability, tamper evidence, or retention of signed-event metadata, both teams need a joint control definition.
Practitioners should also distinguish platform convenience from control sufficiency. A workflow can be easy to use and still fail defensibility if it does not retain the right evidence or if the signing identity is too loosely bound to the act. The signing control is only as strong as the weakest link between authentication, authorization, and evidentiary retention.
Operationally, organisations should verify that the signature record includes the signer identity, timestamp, consent or approval artifact where needed, and an immutable trail that can be reproduced outside the vendor system. Where the eSignature service is part of a wider access stack, a workload or service identity may also need to be governed as part of the control path. Lifecycle processes for managing NHIs is relevant because it shows why identities involved in business workflows need explicit lifecycle ownership, not just technical access.
Risk and Threat Considerations
eSignature controls fail when the organisation can prove execution but not authority, or preserve a document but not the supporting evidence. That creates both compliance risk and adversary opportunity: a compromised account, weak recovery path, or incomplete audit trail can make it difficult to challenge fraudulent signing, while poor retention can prevent later reconstruction of what happened.
Failure mechanism: The signature workflow and the evidence-retention workflow drift apart, so authentication, delegation, logs, and record copies no longer describe the same event with enough integrity to support audit or dispute resolution.
Impact: The organisation may face invalidated approvals, failed audits, weakened non-repudiation, or an inability to prove who signed, when they signed, and under what authority.
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 |
|---|---|---|
| NIST SP 800-53 Rev 5 | IA-2 — Identification and Authentication (Organizational Users) | Signer verification and account assurance are central to eSignature authority. |
| AU-11 — Audit Record Retention | eSignature defensibility depends on retaining the audit trail and signed-event evidence. | |
| CP-9 — System Backup | Signed records and evidence need recoverability if the platform or export path fails. | |
| Recommendation — Enforce strong authentication for users who can execute binding signatures. Retain signature logs and evidence for the required review period. Back up signed records and supporting evidence so they remain recoverable. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | Access control governs who may initiate or approve a binding signature. |
| A.5.33 — Protection of records | Records protection covers preservation of the signed artifact and supporting evidence. | |
| Recommendation — Restrict signing privileges to approved identities and roles. Protect signed records so their integrity and availability survive later review. | ||
Practitioner Guidance
What to prioritise: Define the authoritative record set first, then map which IAM controls prove signer authority and which records controls preserve defensible evidence. If those two maps do not line up, the control design is incomplete even if the platform is functioning normally.
What to verify: Confirm that every signing event can be reconstructed from retained evidence without logging into the original SaaS tenant. That evidence should include signer identity, time, versioned document reference, and the trail of approval or attestation that made the signature valid.
Common mistake: Treating vendor retention settings as equivalent to records governance. Vendor logs and document copies are useful, but they do not automatically satisfy enterprise retention, legal hold, export, or evidentiary requirements.
Practitioner takeaway: The right operating model is dual control, IAM proves the signer had authority, and records management proves the signature can still be trusted later.