Digital Signature Certificates for Secure eSignatures

Award-winning eSignature solution

What digital signature certificates are

Digital signature certificates are electronic credentials that bind a signer’s identity to a cryptographic key pair. In practice, a certificate lets software verify who signed a document and whether the file changed after signing. The signer creates a signature with a private key, and the recipient checks it with the matching public key and certificate chain. In the U.S., this supports secure, attributable signing for contracts, approvals, and regulated records while preserving integrity, intent, and a verifiable audit trail.

Why digital signature certificates matter

They help businesses reduce signing delays, strengthen identity verification, and preserve evidence for disputes. Under ESIGN and UETA, electronic signatures can be legally effective when intent, consent, and attribution are documented, and a certificate-backed workflow can make that record easier to defend.

Why teams look for DocuSign alternatives

Common implementation challenges

Signer identity can be hard to prove when teams rely on weak authentication or shared inboxes.
Expired or revoked certificates can interrupt signing and create verification failures for recipients.
Poor audit records make it difficult to show who signed, when they signed, and what changed.
Mismatched retention rules can leave regulated records incomplete, inaccessible, or stored longer than policy allows.

Real estate

Real estate teams use certificates for leases, disclosures, and closing packets that need clear signer attribution.

Healthcare

Healthcare organizations use them for intake forms, consent records, and HIPAA-sensitive authorizations.

People who benefit most

Operations leaders at companies like Tech Data use signNow to move internal approvals and customer-facing documents faster while keeping signatures tied to the right forms and workflows. Certificate-backed signing helps them route documents through systems such as NetSuite without losing control over document versions or signer identity.
Founders and directors in regulated service businesses, such as Martin Properties and Fertility Centers of Illinois, use signNow to collect signatures on mobile and desktop while preserving compliance evidence. The certificate layer supports secure execution, auditability, and easier handling of documents that move between office, field, and remote signers.

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Identity binding

Links each signature to a certificate-backed identity record, helping recipients verify the signer and the signed file’s integrity.

Tamper evidence

Creates a tamper-evident record so later edits are easier to detect and challenge if needed.

Audit trail

Captures signer activity in a clear audit trail, including timestamps and document events.

Compliance support

Supports regulated workflows with controls that help align signing records to ESIGN, UETA, and HIPAA needs.

Cross-device use

Works across desktop and mobile signing flows, so users can sign without changing the record’s legal structure.

Certificate workflows

Fits certificate-based approvals for contracts, forms, and internal authorizations that need stronger attribution than a simple drawn signature.

Connected workflows and systems

Connected systems move signed documents into the tools teams already use, reducing manual re-entry and keeping records aligned across departments.

How digital signature certificates work

A certificate-backed signature follows a simple sequence from identity verification to validation, with each step recorded for later review.

Issue certificate: The certificate binds the signer to a unique cryptographic identity.
Verify identity: The signer authenticates before applying the signature.
Apply signature: The document is signed and sealed against later changes.
Check validity: Recipients validate the certificate chain and signature status.

Quick setup steps

Use a short setup sequence to prepare a certificate-backed signing flow and keep the process easy to review.

Prepare file:
Upload the document you want signed.
Set recipients:
Choose who must sign and in what order.
Add verification:
Select certificate-backed authentication for the signer.
Track signing:
Send the document and monitor completion.

Setting	Recommendation
Authentication method	SMS OTP plus ID verification
Signature type	Advanced electronic signature
Audit trail	Enable full event logging
Document retention	6 years (HIPAA 45 CFR 164.530(j)(2))
Encryption	TLS 1.2/1.3 and AES-256

Platform and device requirements

Use a modern browser or mobile app with TLS 1.2 or TLS 1.3 enabled. Chrome, Firefox, Safari, and Edge support web signing on Windows, macOS, iOS, and Android devices.

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

For enterprise or regulated deployments, managed devices, SSO provisioning, and API access may matter more than the browser itself. Administrators should also confirm certificate handling, retention policy, and export needs before rollout so records stay usable across teams and review cycles.

Security and compliance

Encryption:

TLS 1.2/1.3 in transit

Storage protection:

AES-256 at rest

SOC 2 Type II:

SOC 2 Type II available

ISO 27001:

ISO 27001 certified

HIPAA:

HIPAA support with BAA

Privacy and trust:

GDPR and eIDAS aligned

NetSuite operations

A NetSuite operations leader needed signatures tied to the right documents across systems.

Kodi-Marie Evans at Xerox used signNow with NetSuite.
Right signatures on the right documents.

The workflow kept document routing organized while preserving signer context and reducing format confusion across teams. That matters when approvals move between business systems and need a clear record of who signed what, and when.

Property operations

A founder in a property business needed secure online execution for mobile and offline work.

Tim Martin at Martin Properties signed documents online.
100% compliance and built-in security.

Certificate-backed signing supported remote execution, mobile use, and a cleaner evidence trail for property documents. The result was a more controlled process for agreements that still needed reliable attribution and durable records.

Best practices for rollout

A careful rollout reduces identity gaps, recordkeeping errors, and avoidable compliance issues in certificate-based signing workflows.

Match verification to risk

Use stronger identity checks for contracts, healthcare records, and financial approvals. Pair the certificate with SMS OTP, ID verification, or another method that matches the document’s risk level and the evidence you may need later.

Preserve the audit trail

Keep the audit trail complete from invitation to completion. Record signer identity, timestamps, and document events so the final file can support internal review, dispute response, and retention requirements without extra reconstruction.

Define retention early

Set retention rules before sending regulated records. Align storage and deletion with HIPAA, FERPA, or internal policy so signed files remain available for the required period and do not create unnecessary data exposure.

Control access carefully

Limit certificate access to authorized users and managed devices. Use role-based provisioning, SSO, and clear admin controls so signing authority stays tied to the right people and can be reviewed when staff changes occur.

Day 0:

Set up the account, users, and retention policy.

Day 1:

Send the first certificate-backed document.

Week 1:

Onboard the core team and review audit exports.

7-day trial:

signNow includes a 7-day free trial, no credit card required.

HIPAA retention:

Signed PHI records: 6 years per 45 CFR §164.530(j)(2).

21 CFR Part 11:

Use secure timestamps, access controls, and retained history.

UETA adoption:

49 states, D.C., Puerto Rico, and the U.S. Virgin Islands have adopted UETA.

Annual billing:

Business starts at $8/user/mo billed annually.

Risks of poor implementation

Weak identity

A court may question attribution.

Incomplete trail

Records may fail audit review.

Integrity challenge

A signed file may be disputed.

Retention failure

Retention gaps can trigger policy violations.

Signer authentication:

Confirm the signer’s identity before acceptance.

Timestamp capture:

Record UTC timestamps for each event.

Document hashing:

Hash the document before and after signing.

Tamper-evident sealing:

Seal the file with tamper-evident controls.

Audit trail storage:

Store the event log with the signed file.

Audit-trail export:

Export the audit trail for review or dispute support.

	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-day trial	Not verified	Not verified	Not verified	Not verified
Bulk send	Business Premium	Not verified	Not verified	Not verified	Not verified
Audit trail	Included	Included	Included	Included	Included
HIPAA compliance	BAA required	BAA available	BAA available	Not verified	Not verified

signNow	DocuSign	Adobe Sign	PandaDoc
ESIGN and UETA	Yes	Yes	Yes
Audit trails	Yes	Yes	Yes
HIPAA support	BAA available	BAA available	BAA available	BAA available
Envelope cap	Unlimited	100/year	Not verified

FAQ and troubleshooting

These answers focus on plan limits, compliance settings, and evidence handling that affect certificate-backed signing in signNow.

signNow Business includes legally binding eSignatures, audit trails, templates, mobile apps, and compliance support for ISO 27001, SOC 2, and GDPR. If you need HIPAA, use a BAA and confirm the workflow matches your record type.

signNow supports HIPAA workflows when a BAA is in place. The platform’s compliance controls, audit trail, and encryption help protect PHI, but your organization still needs proper access controls and retention practices under 45 CFR §164.312 and §164.530(j)(2).

For 21 CFR Part 11 use cases, signNow should be configured with unique user IDs, secure timestamps, access controls, and retained document history. Validate the workflow against your predicate rule and confirm your internal validation records before use.

If a signer cannot complete verification, check the authentication method first. signNow workflows can use stronger identity checks, and the issue is often an expired code, a blocked SMS message, or an incorrect recipient email address.

The Business plan is priced at $8/user/mo billed annually, and it includes unlimited users. If you need bulk send, advanced signer authentication, or higher-volume workflows, Business Premium or Enterprise may fit better.

For document disputes, export the audit trail and signed file together. The record should show timestamps, signer activity, and document history, which helps support ESIGN and UETA enforceability when intent and attribution are questioned.

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