Class III Digital Signature Certificate for SignNow

Award-winning eSignature solution

What a class iii digital signature certificate is

A class iii digital signature certificate is a certificate-based digital identity used to sign documents with cryptographic proof of who signed and whether the file changed afterward. It works through public key infrastructure, where a certificate authority issues a certificate that links a signer’s identity to a public key. When the signer applies the signature, the system creates a hash of the document, encrypts that hash with the private key, and records the event in an audit trail.

Why this certificate matters

It helps organizations sign higher-risk records with stronger identity assurance and tamper evidence, which supports faster approvals and cleaner recordkeeping. Under ESIGN and UETA, the signature can be enforceable when intent, attribution, and record integrity are preserved.

Why teams look for DocuSign alternatives

Common implementation pain points

Identity proofing can slow onboarding when signer verification steps are not aligned with the document’s risk level.
Certificate expiration can interrupt signing if renewal and revocation checks are not monitored before use.
Weak authentication creates attribution disputes when the signer’s identity is challenged after execution.
Poor retention practices can leave audit evidence incomplete during litigation, compliance reviews, or internal audits.

Regulated records

Used for contracts, approvals, and regulated records that need stronger signer attribution and a complete audit trail.

Enforceable workflows

Used for documents that must support ESIGN and UETA enforceability, plus internal compliance review.

People who benefit most

Real estate operations teams at firms like Martin Properties use certificate-backed signing to move leases, disclosures, and closing packets online while preserving an audit trail that supports compliance and remote execution across mobile and desktop workflows.
NetSuite operations leaders, such as Xerox’s director of NetSuite operations, use signNow to route the right signatures to the right documents in the right format, which helps standardize approvals across ERP-driven finance and procurement processes.

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Cryptographic binding

Creates a cryptographic link between the signer and the document, helping preserve integrity after signing and making later edits detectable.

Audit trail

Records signer activity, timestamps, and document history so teams can review the signing sequence without relying on paper files.

Identity assurance

Supports stronger identity checks for higher-risk approvals, which helps reduce attribution disputes in regulated workflows.

Mobile access

Works across desktop and mobile signing flows, so distributed teams can complete approvals without printing or scanning.

Record retention

Stores signed records in a format that supports retention, retrieval, and internal review for compliance teams.

Certificate workflow

Fits certificate-based signing workflows that need a higher-assurance digital signature rather than a simple drawn signature.

Integrations that fit certificate workflows

Connected systems move signed records into the tools teams already use, reducing manual re-entry and keeping approvals tied to business records.

How the signing flow works

The signing process follows a short cryptographic sequence that ties identity, integrity, and evidence together.

Issue certificate: The certificate links the signer’s identity to a public key.
Hash document: The document is hashed before signing.
Apply signature: The private key signs the hash.
Record and seal: The system logs the event and seals the record.

Quick setup steps

Use a short setup sequence to prepare certificate-based signing for controlled document workflows.

Verify identity:
Confirm the signer’s identity before sending the document.
Prepare document:
Upload the file and choose the signing order.
Place fields:
Add required fields, initials, and signature locations.
Send for signature:
Send the request and monitor completion status.

Setting	Recommendation
Authentication method	SMS OTP with ID verification
Signature type	Certificate-based digital signature
Audit trail	Enable full event logging
Document retention	6 years for HIPAA records
Encryption	TLS 1.2/1.3 and AES-256

Platform and device support

Use current browsers, supported mobile apps, and secure connections when signing or reviewing certificate-based documents.

Desktop browsers Chrome, Firefox, Edge, and Safari
Operating systems Windows, macOS, iOS, and Android
Mobile access signNow mobile apps on iOS and Android

For regulated deployments, managed devices, SSO, and API-based document routing help keep access controlled across teams. Browser and OS support should match your internal security policy, and mobile workflows should be tested before rollout in healthcare, finance, or legal environments.

Security and compliance controls

Transport encryption:

TLS 1.2/1.3 in transit

Storage encryption:

AES-256 at rest

Security report:

SOC 2 Type II available

Information security:

ISO 27001 certified

Healthcare compliance:

HIPAA support with BAA

Regulated records:

21 CFR Part 11 controls

Real estate operations

A real estate team needed faster lease execution without losing audit evidence or mobile access.

Martin Properties used online execution for property documents.
The team kept 100% compliance and built-in security.

The workflow supported remote signing, preserved evidence, and reduced paper handling for property documents across office and mobile use.

ERP operations

An ERP operations leader needed the right signatures on the right documents in the right format.

Xerox connected signNow with NetSuite workflows.
The team routed approvals by document type and format.

The integration helped standardize signature routing inside NetSuite-driven processes and reduced manual handling across internal and external approvals.

Best practices for controlled signing

A careful setup reduces attribution disputes, preserves evidence, and keeps regulated workflows easier to review later.

Match verification to risk

Use stronger identity checks for contracts, claims, and other records where signer attribution may later be reviewed. Keep the verification method aligned with the document’s risk and retention needs.

Manage certificate lifecycle

Keep certificate expiration, revocation, and renewal processes under active review so signing does not stop unexpectedly. Assign ownership for certificate lifecycle management and document the renewal path.

Protect signing evidence

Preserve the full audit trail with timestamps, signer identity details, and document history. Store records in a controlled repository so legal, compliance, and operations teams can retrieve them quickly.

Restrict workflow access

Limit access to signing workflows with role-based permissions and SSO where available. Separate preparers, approvers, and signers so each person only sees the actions needed for their role.

FAQ and troubleshooting

These answers focus on plan limits, compliance requirements, and signing issues that affect certificate-based workflows.

signNow Business starts at $8/user/mo billed annually and includes audit trails, templates, and mobile apps. For HIPAA workflows, use a BAA and keep retention aligned with 45 CFR §164.530(j)(2).

signNow’s Business Premium plan adds bulk send, while Enterprise adds advanced signer authentication. If your workflow needs higher assurance, compare the plan features before assigning certificate-based signing.

All major vendors support ESIGN and UETA baseline compliance, but the evidentiary value depends on signer intent, authentication, and audit trail quality. signNow records timestamps and document history for review.

If a signer cannot complete the flow on mobile, confirm browser support on iOS or Android and test the signNow app. Mobile-created eSignatures remain valid under ESIGN and UETA when intent is clear.

For 21 CFR Part 11 workflows, use unique user IDs, secure audit trails, and validated access controls. signNow’s compliance features support regulated recordkeeping, but your internal validation process still matters.

If a certificate appears expired or revoked, stop the signing process and renew or replace the certificate before reuse. PKI validation depends on certificate status checks, including OCSP or CRL review.

signNow	DocuSign	Adobe Sign	PandaDoc
Audit trails	Yes	Yes	Yes
ESIGN and UETA	Yes	Yes	Yes
Mobile apps	Yes	Yes	Yes
Envelope cap	No cap	100/user/yr	Not verified

Day 0:

Set up signNow Business and confirm annual billing at $8/user/mo.

Day 1:

Send the first certificate-based document after identity checks are configured.

Week 1:

Onboard the full team and confirm signing roles, permissions, and retention rules.

7-day trial:

signNow offers a 7-day free trial with no credit card required.

HIPAA retention:

Keep signed PHI records for 6 years per 45 CFR §164.530(j)(2).

Part 11 records:

Retain validated audit evidence for FDA-regulated records under 21 CFR Part 11.

UETA coverage:

UETA is adopted in 49 states, the District of Columbia, Puerto Rico, and the U.S. Virgin Islands.

Renewal review:

Review certificate status before each new signing cycle.

Risks of improper use

Weak attribution

The document may be harder to defend in court.

Incomplete logs

Audit evidence may be rejected in a review.

Recordkeeping gaps

Retention failures can trigger compliance findings.

Certificate lapse

Expired certificates can block valid signing.

Signer authentication:

The signer is verified before the session is accepted.

Timestamp capture:

A UTC timestamp is attached to each event.

Document hashing:

The document hash is computed before sealing.

Tamper-evident sealing:

The record is sealed against later changes.

Audit export:

The audit trail can be exported for review.

Trail retrieval:

The full history remains available for retrieval.

	signNow	DocuSign	Adobe Sign	PandaDoc	HelloSign
Starting price	$8/user/mo	$15/user/mo	$14/user/mo	$19/user/mo	$15/user/mo
Free trial	7 days	Not verified	Not verified	Not verified	Not verified
Bulk send	Yes	Not verified	Not verified	Not verified	Not verified
Audit trail	Yes	Yes	Yes	Yes	Yes
HIPAA compliance	BAA required	BAA available	BAA available	Not verified	Not verified

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