Open Digital Signature Solutions with SignNow

Generate an eSignature space for your PDF document and adjust it in just a couple of seconds. Submit your digital documents to recipients and have the docs signed online from your mobile or desktop device and from anywhere.

No credit card required
See how it works!Click here to sign a sample doc

Award-winning eSignature solution

What an open digital signature is and why it matters

An open digital signature is a standards-aligned electronic signature method that uses interoperable cryptographic formats and public key infrastructure to verify signer identity and protect document integrity. It emphasizes portability across platforms, vendor-neutral verification, and long-term validation of signed files. In business use, open digital signatures reduce dependence on proprietary formats, improve archival compatibility, and support automated validation during audits and regulatory reviews while preserving an auditable chain of custody for each signed document.

Reasons to adopt open digital signature workflows

Open digital signatures increase interoperability, reduce vendor lock-in, and support long-term archive validation, making them suitable for regulated environments and multi-vendor integrations.

Reasons to adopt open digital signature workflows

Common challenges when moving to open digital signatures

  • Managing cryptographic keys across departments can be complex and requires clear policies and secure key storage.
  • Ensuring signer identity without adding friction may require multi-factor approaches and careful UX design.
  • Integrating legacy document repositories to validate signatures over long retention periods often needs migration and reformatting.
  • Training staff and auditors on verification procedures is necessary to maintain chain-of-custody and compliance.

Typical user roles and responsibilities

Legal Counsel

Legal counsel evaluates signature validity and ensures documents meet regulatory and evidentiary standards. They review certificate policies, approve retention rules, and coordinate with IT on key management to support admissibility in disputes.

IT Administrator

IT administrators configure cryptographic services, integrate signature validation into document workflows, manage certificate authorities and key storage, and enforce access controls to maintain security and audit readiness.

Who typically uses open digital signatures

Organizations across legal, finance, healthcare, and government sectors adopt open digital signatures for validated, auditable electronic approvals.

  • Legal teams requiring non-repudiation and verifiable signatures for contracts and filings.
  • Finance departments for invoice approvals, payment authorizations, and audit-friendly transaction records.
  • Healthcare administrators validating consents and records while aligning with HIPAA controls.

Use cases span document exchange, contract execution, long-term archives, and automated verification across integrated systems.

Six key features to evaluate for open digital signature needs

Evaluate these capabilities to ensure an implementation supports legal defensibility, interoperability, and operational efficiency within U.S. compliance frameworks.

Standards Compliance

Support for open formats and standards such as PAdES and interoperable PKI ensures signatures can be validated across vendors and preserved for long-term archival and legal review.

Interoperability

Ability to verify signatures created by other platforms and to export signed documents in portable formats reduces vendor lock-in and eases cross-organization exchanges.

Audit Trails

Comprehensive, immutable logs capturing signer events, timestamps, IP information, and validation checks support internal controls and legal evidence requirements for transactions.

Authentication Options

Flexible signer authentication including multi-factor methods, SSO, and knowledge-based checks lets organizations align signer assurance with transaction risk and regulatory obligations.

Document Preservation

Features that produce archival-grade formats, embed validation metadata, and support timestamping preserve signature integrity and enable reliable verification over extended retention periods.

Scalability

Bulk Send, templating, and API automation reduce manual work for high-volume signing while preserving cryptographic evidence and access controls for enterprise workloads.

be ready to get more

Choose a better solution

No credit card required

Integration features for common document ecosystems

Open digital signature support is most effective when it integrates directly with authoring and storage apps used daily by teams.

Google Docs

Seamless integration enables signing documents created in Google Docs while preserving original formatting. Signatures are embedded in exported PDF/A files and include verification metadata to facilitate future validation and audit processes.

CRM Connectors

Connectors synchronize templates and signed records with CRM systems, attaching validated documents to customer profiles. This reduces manual uploads and maintains a verifiable history of customer agreements for sales and service teams.

Dropbox Integration

Two-way sync stores signed files in Dropbox while preserving verification data. Automated folder rules and retention policies can route signed documents to archival directories for compliance and backup.

API Access

APIs allow developers to embed open digital signature capabilities into line-of-business applications, enabling automated signing, verification, and storage while maintaining cryptographic provenance and audit trails.

How open digital signature flows operate

Understanding the stages of an open digital signature helps integrate signing into existing processes with minimal disruption.

  • Initiation: Sender prepares document and signer list.
  • Authentication: Signer verifies identity with configured methods.
  • Signing: Cryptographic signature applied to document.
  • Verification: Recipient or system confirms signature validity.
Collect signatures
24x
faster
Reduce costs by
$30
per document
Save up to
40h
per employee / month

Step-by-step: completing an open digital signature

A concise workflow describes creating, signing, validating, and archiving a document with an open digital signature.

  • 01
    Prepare Document: Ensure correct format and required fields.
  • 02
    Apply Signature: Signer uses PKI-based signature tool.
  • 03
    Validate Signature: Check certificate chain and revocation status.
  • 04
    Archive Record: Store signed file and verification metadata.
be ready to get more

Why choose airSlate SignNow

  • Free 7-day trial. Choose the plan you need and try it risk-free.
  • Honest pricing for full-featured plans. airSlate SignNow offers subscription plans with no overages or hidden fees at renewal.
  • Enterprise-grade security. airSlate SignNow helps you comply with global security standards.
Start free trial
illustrations signature

Typical workflow configuration settings

Recommended settings streamline signing, reminders, and retention while preserving verification evidence for audits.

Setting Name Configuration
Reminder Frequency 48 hours
Signature Format PDF/A with embedded PKI
Timestamping Policy RFC 3161 timestamps
Retention Period 7 years
Revocation Handling OCSP preferred

Supported platforms and minimum requirements

Open digital signature workflows run across modern desktop and mobile environments but require specific platform capabilities for key operations.

  • Desktop: Modern browsers supported
  • Mobile: iOS and Android apps
  • Server: OCSP/CRL and timestamping

Ensure browsers support cryptographic APIs or use native apps; verify mobile OS versions meet security patching expectations and that server components can perform OCSP/CRL checks and timestamping for long-term validation.

Core security controls for open digital signatures

Encryption: Asymmetric cryptography
Key Management: Hardware-backed storage
Signature Hashing: SHA-2 family
Audit Trail: Immutable logs
Authentication: Multi-factor options
Revocation Checks: CRL/OCSP support

Industry examples using open digital signatures

Practical implementations show how open digital signatures streamline verification, retain legal validity, and integrate with existing document systems.

Healthcare Consent Workflow

A hospital replaced paper consent with open digital signatures to secure patient approvals and preserve audit trails for long-term records

  • Implementation used PKI-backed signatures embedded in PDFs
  • Clinical teams accessed signed forms via the EHR with automated verification

Resulting in faster patient throughput and auditable, HIPAA-aligned consent retention.

Financial Contract Automation

A mid-sized lender adopted open digital signatures for loan documents to standardize cross-branch processing and simplify audits

  • Signatures were validated through interoperable certificate chains
  • Integration with loan origination systems enabled automated checks and storage

Leading to reduced closing times and clearer evidence for compliance reviews.

Best practices for secure and accurate open digital signatures

Follow these operational and technical practices to ensure signatures are legally defensible, secure, and easy to verify over time.

Establish certificate policies and lifecycle controls
Define who can issue certificates, required proofing levels, and renewal/revocation processes. Maintain documented procedures for key compromise and ensure certificate authorities meet organizational assurance requirements.
Use multi-factor signer authentication where appropriate
Combine possession factors and knowledge or biometric checks to reduce fraud risk. Map authentication levels to transaction sensitivity and regulatory requirements such as HIPAA or finance-specific oversight.
Preserve signature metadata and validation evidence
Store signed documents in archival formats (PDF/A) and capture certificate chains, OCSP/CRL checks, timestamps, and verification logs to support future validation and legal defensibility.
Train staff and include verification in audits
Provide practical guidance for staff on signing and verification processes, and include signature validation checks in routine compliance audits to detect process drift or configuration issues.
Connect airSlate SignNow to your apps
Check out airSlate SignNow integrations
Data accuracy, security, and compliance
airSlate SignNow is committed to protecting your sensitive information by complying with global industry-specific
Learn more about security

FAQs and troubleshooting for open digital signatures

Answers to common questions and guidance for addressing verification, compatibility, and signature errors when using open digital signatures.

Feature availability: open digital signature support

A quick compatibility check comparing support for open digital signature features across vendors commonly used in U.S. organizations.

Criteria signNow (Recommended) DocuSign Adobe Sign
Open standards support
PKI-based signatures
Long-term validation Timestamping Timestamping Timestamping
HIPAA-ready configurations BAA available BAA available Enterprise BAA
be ready to get more

Get legally-binding signatures now!

Start your free trial

Document retention and key deadlines to consider

Retention policies and validation checkpoints protect signature validity and compliance; plan timelines for certificate renewal and evidence preservation.

Retention Policy Start:

Define retention start date at signing

Certificate Renewal Cycle:

Align with CA renewal schedules

Timestamp Preservation:

Retain RFC 3161 timestamps long-term

Revocation Records Archive:

Store OCSP/CRL responses for audits

Periodic Verification Checks:

Run routine integrity checks annually

Risks and penalties from improper signature handling

Regulatory fines: Monetary penalties
Contract disputes: Invalid agreements
Data breaches: Unauthorized access
Evidence gaps: Non-admissible records
Operational delays: Process disruptions
Reputational harm: Loss of trust

Provider comparison: features and plan highlights

Comparing practical plan attributes and enterprise capabilities across widely used eSignature providers for U.S. organizations.

Solution Provider Comparison signNow (Recommended) DocuSign Adobe Sign HelloSign PandaDoc
Starting Plan Descriptor Entry-level plan with per-user monthly billing Multiple individual and business tiers available monthly Included in Adobe Acrobat and standalone plans monthly Free tier and paid tiers for teams Free trial then team plans with per-user pricing
Free Trial Free trial available for new accounts Free trial available for individual users Free trial access via Adobe account Free trial available with paid plans Free trial and free eSign plan features
API Availability REST API with SDKs for common languages Comprehensive REST API with SDKs APIs integrated with Adobe Document Cloud API with developer tools and SDKs API focused on document automation
Advanced Authentication Offers multi-factor and knowledge-based auth options Supports SMS, phone, and knowledge-based auth Supports KBA and federated identity options Provides SMS and two-factor auth Two-factor and SSO options available
HIPAA Support Business Associate Agreement available for HIPAA BAs and HIPAA-capable configurations offered HIPAA support with enterprise agreements HIPAA requires enterprise plan and agreements HIPAA support through enterprise contracts

eSign and Manage Files Comfortably with airSlate SignNow

airSlate SignNow is a sturdy, full-featured, and award-winning solution for eSigning and managing documents both on desktop and cell phone. A great deal of businesses, notably Xerox, CBS Sports, and Colliers already have experienced the advantages of using airSlate SignNow. Not only does it simplify and boost document turnover as nearly all eSignature software does, but it additionally brings versatility to the entire process of eSigning.

The distinguishing features of airSlate SignNow which make it an exclusive and paramount option among the competitors are the following:

  • Upload existing agreements or build blanks via the on-line editor and reuse them later on.
  • Use handwritten, typed in, or scanned signatures. Before delivering a contract out for verification, you are able to determine which kind of signature a receiver of the email can use.
  • Send a contract out for signing to one or numerous signers via email or link.
  • Configure an expiry date to have your file validated by the due date.
  • Stay updated with reminders. All users including the sender will get notifications until each role has been accomplished (changeable in advanced configurations).
  • Keep the signing process comfortable for recipients. Signees don't need to register or sign-up to validate the contract.

airSlate SignNow's intuitive user interface makes it practical for users to share folders between teams, and build top quality workflows. Utilizing the apps for iOS and Android, handling and verifying documents on the go is really a reality.

Being compliant with major security standards, airSlate SignNow guarantees your data is safe. The embedded, court-admissible Audit Trail tracks every alteration to your document, keeping everybody accountable.

Sign up for a free trial and begin developing effective eSignature workflows with airSlate SignNow.

walmart logo
exonMobil logo
apple logo
comcast logo
facebook logo
FedEx logo

Explore Advanced Features

Discover More eSignature Tools

be ready to get more

Get legally-binding signatures now!

Start free trial
Company
Forms
Pricing
Resources
Knowledge base
Products
© 2026 airSlate Inc. All rights reserved.
English