Access reviews help by confirming that only the right users and service accounts can initiate, approve, or administer signing workflows. They also expose stale connector permissions and excess administrative rights that can compromise document integrity. Without periodic review, a secure signing product can still operate inside an unsafe access model.
Why This Matters for Security Teams
Electronic signature workflows are high-value because they combine sensitive documents, approval authority, integration tokens, and audit evidence in one path. Access reviews are the control that tests whether the people and service accounts behind that path still need the access they hold. Without them, a signing platform can look compliant while stale admin rights, orphaned connectors, or overbroad approval permissions quietly weaken document integrity.
This is especially important because access in signing workflows is rarely static. A reviewer may leave a team, a service account may keep broad API scope after a migration, or a connector may remain active long after its business owner changed. The OWASP Non-Human Identity Top 10 and NIST’s access-oriented guidance both point to the same practical issue: identity sprawl is not just an infrastructure problem, it is an integrity problem.
NHIMG’s Ultimate Guide to NHIs notes that 97% of NHIs carry excessive privileges, which makes access reviews especially important for signing platforms that depend on service accounts and workflow integrations. In practice, many security teams discover signing abuse only after a workflow has already been over-permissioned for months, rather than through intentional review discipline.
How It Works in Practice
effective access reviews for electronic signature workflows focus on every identity that can initiate, approve, route, or administer signing actions. That includes human users, privileged administrators, automation accounts, API clients, and connector identities tied to document management or HR systems. The review should confirm business ownership, current necessity, and whether the assigned rights still match the role or integration purpose.
A practical review usually checks four things:
- Who can start a signing envelope or transaction
- Who can approve, countersign, or override approval steps
- Which service accounts or API keys can integrate with the signing platform
- Which administrators can change templates, routing rules, retention settings, or audit logs
That review should be evidence-based. Teams should compare entitlements against current job roles, ticket history, system inventories, and business ownership records. Where possible, they should remove standing access and replace it with tightly scoped privilege and NHI lifecycle management practices that revoke access when an identity is no longer needed. For service accounts, current guidance suggests pairing reviews with secret rotation and offboarding checks, since stale credentials often survive longer than the business role that justified them.
For program-level control, security teams can map the review process to the NIST Cybersecurity Framework 2.0 and reinforce it with workflow logging, owner attestations, and exception tracking. NHIMG’s research also shows that only 5.7% of organisations have full visibility into their service accounts, which is why signing controls often fail at the integration layer rather than in the signer-facing application itself. These controls tend to break down when signature workflows are tied to multiple business systems with no single owner because entitlement decisions become fragmented across teams.
Common Variations and Edge Cases
Tighter access review requirements often increase administrative overhead, requiring organisations to balance assurance against operational speed. That tradeoff becomes more visible in regulated signing use cases, where a delayed review can stall contracts, HR actions, or customer onboarding.
Not every signing workflow needs the same review cadence. High-risk roles such as template administrators, legal approvers, and connector owners usually merit more frequent review than ordinary end users. Best practice is evolving for automated approval chains and delegated signing, because organisations still disagree on whether reviewer attestation alone is enough when the underlying identity is a service account. Current guidance suggests treating these exceptions as time-bound and explicitly approved, not as permanent access patterns.
There are also edge cases where access review scope must extend beyond the signing product itself. If the workflow relies on cloud storage, ticketing systems, or identity providers, those upstream permissions can still undermine the integrity of a signed document even when the e-signature platform is correctly configured. The 52 NHI Breaches Analysis shows how often compromised non-human identities become the pivot point for broader abuse, which is why review scope should include connected identities, not just named users.
In practice, access reviews are most effective when they remove dormant privilege before a signature dispute, audit finding, or workflow manipulation forces the issue.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and OWASP Agentic AI Top 10 address the attack and risk surface, while NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Reviews reduce excessive privilege and stale NHI access in signing workflows. |
| NIST CSF 2.0 | PR.AC-4 | Access permissions must be managed and reviewed to protect workflow integrity. |
| OWASP Agentic AI Top 10 | Automated signing agents and connectors need runtime access constraints. |
Validate entitlements for users and service accounts against current roles and revoke excess access.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 11, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
