Digital Signature Verification for This File
Award-winning eSignature solution
What this verification message means
The message that the digital signature for this file couldn't be verified means the system could not confirm the signature’s trust chain, signer identity, or document integrity. In practice, a digital signature uses cryptography to bind a signer’s key to the file and detect later changes. Verification checks the certificate, the signature hash, and revocation status. If any part fails, the file may still open, but the signature cannot be treated as fully validated until the issue is resolved.
Why verification matters legally
A verified digital signature helps support enforceability, reduce disputes, and preserve evidence under ESIGN and UETA. It does not replace legal review, but it strengthens attribution, integrity, and auditability for U.S. business records, contracts, and regulated workflows.
Frequent verification problems
Expired or revoked certificates prevent the signature from validating against the current trust chain. Mismatched signer identity can block attribution when the certificate name does not match the record. Document edits after signing break the hash and trigger a verification failure. Missing revocation data or offline validation can leave the signature status unresolved.
Who relies on verified signatures
Legal teams
Legal teams use verified signatures for contracts, settlement documents, and internal approvals that need a defensible record.
Regulated workflows
Healthcare, finance, and real estate teams use them for records that need stronger identity and integrity evidence.
User roles that benefit most
Teams handling lease packets, disclosures, and closing files often need a clear audit trail and signer attribution. In real estate workflows, signNow customers use mobile signing and document routing to keep transactions moving without losing evidence of who signed and when. Operations leaders in healthcare, finance, and services often need signatures that fit compliance-heavy records and internal controls. signNow customer stories highlight faster turnaround, easier customer signing, and better integration with systems like NetSuite for document-driven approvals.
Best ROI. Our customers achieve an average 7x ROI within the first six months.
Scales with your use cases. From SMBs to mid-market, airSlate SignNow delivers results for businesses of all sizes.
Intuitive UI and API. Sign and send documents from your apps in minutes.
Core capabilities that support verification
Verified signatures help preserve trust in the record, reduce manual checks, and make signing evidence easier to review later.
Identity check
Confirms signer identity, document integrity, and signing time so the record is easier to defend in audits or disputes.
Audit trail
Captures a tamper-evident history that shows who viewed, signed, or changed the file and when.
Tamper detection
Uses cryptographic hashing to reveal post-signing edits and protect the signed version from silent changes.
Cross-device signing
Supports mobile and desktop signing so users can complete records without changing the legal workflow.
Workflow control
Keeps records organized with templates, routing, and reminders that reduce manual follow-up and missed signatures.
Compliance support
Works with regulated recordkeeping needs by preserving evidence that supports ESIGN, UETA, and internal policy review.
How verification works step by step
Verification follows a fixed sequence, from identity checks to hash comparison, so the result reflects both the signer and the file state.
Validate signer: The system checks the signer’s certificate and identity details. Check integrity: It hashes the document and compares the stored value. Confirm trust: It reviews revocation data and timestamp evidence. Set status: It marks the signature valid, pending, or unverifiable.
Quick steps to review a signed file
Use a short review sequence to confirm the file, the signer, and the stored evidence before filing or sharing it.
Open the record:
Open the signed file and review the signature panel. Review identity:
Check the signer name, date, and certificate details. Check integrity:
Confirm the document has not changed after signing. Store evidence:
Save the verified copy with the audit trail.
Recommended verification setup
Use stronger identity checks, preserve the signing record, and keep retention aligned with the governing record rule.
| Setting | Recommendation |
|---|---|
| Authentication method | SMS OTP with ID verification |
| Signature type | Digital signature with certificate |
| Audit trail | Full time-stamped event log |
| Document retention | 6 years (HIPAA 45 CFR 164.530(j)(2)) |
| Encryption | TLS 1.2/1.3 and AES-256 |
Browser and device requirements
Use a modern browser or the signNow mobile app to view, sign, and verify documents. TLS 1.2 or later supports secure transport, while current versions of Chrome, Firefox, Safari, and Edge provide the best compatibility for signature review on Windows, macOS, iOS, and Android.
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 deployments, managed devices, SSO, and API access help keep signing consistent across teams. Regulated workflows may also need certificate validation, retention controls, and exportable records so the signed file remains usable for audits, legal review, and internal policy checks.
Security and compliance safeguards
Encryption:
Storage protection:
Independent controls:
Security management:
Healthcare workflows:
Legal framework:
Real-world signing examples
These examples show how teams use signNow to keep documents moving while preserving identity, timing, and record integrity.
Real estate operations
A real estate team needed faster signing without losing evidence.
- Mobile signing kept lease packets moving.
- Audit trails supported later review.
Teams like Martin Properties have described processing documents online with compliance and built-in security, which helps keep records usable across mobile and offline workflows.
Systems operations
An operations leader needed better routing between systems and signers.
- NetSuite integration matched the right documents.
- Signatures reached the right parties faster.
Xerox’s NetSuite operations story shows how signNow can help route the right signatures to the right documents, improving control without adding manual steps.
Best practices for verified signatures
A disciplined setup makes verification easier later, especially when the file may be reviewed by legal, compliance, or audit teams.
Match authentication to risk
Preserve the full record
Protect the final file
Align retention with policy
FAQ about unverified signatures
These answers focus on validation, compliance, and plan selection so teams can resolve signature status issues without guessing.
If the signature shows as unverified in a PDF viewer, open the file in signNow and review the certificate, timestamp, and audit trail. signNow Business and higher plans include audit trails, while regulated workflows may need HIPAA support with a BAA.
If the certificate is expired or revoked, the signature may no longer validate against the current trust chain. Check revocation status and timestamp evidence, then confirm whether the signer used a certificate-based digital signature or a simpler eSignature.
If a healthcare record needs stronger controls, use a plan and workflow that support HIPAA requirements, including a signed BAA, audit controls, and 6-year retention under 45 CFR 164.530(j)(2).
If a file changed after signing, the hash will no longer match and the signature will fail validation. Restore the original signed PDF and compare the audit trail before accepting the record.
If you need higher-assurance identity checks, use two-factor authentication or ID verification. For sensitive workflows, stronger authentication improves attribution under ESIGN and UETA and supports defensible records.
If you need a public-facing comparison of plan features, signNow Business starts at $8/user/mo annually, Business Premium adds bulk send, and Enterprise adds advanced signer authentication and integrations.
Vendor comparison for verified signatures
This comparison focuses on baseline compliance and signature evidence across leading vendors used in U.S. business workflows.
| signNow | DocuSign | Adobe Sign | PandaDoc |
|---|---|---|---|
| ESIGN and UETA | Yes | Yes | Yes |
| Audit trail | Yes | Yes | Yes |
| Starting price | $8/user/mo | $15/user/mo | $14/user/mo |
| Free trial | 7-day trial | Not verified | Not verified |
Rollout and retention timeline
Use this timeline to plan adoption, first use, and recordkeeping without repeating the signing workflow details.
Day 0:
Day 1:
Week 1:
7-day trial:
HIPAA retention:
21 CFR Part 11:
ESIGN and UETA:
Annual billing:
Risks of skipping verification
Unverified signature
Identity gap
Missing controls
Post-signing edits
Inside the audit trail
The audit trail captures identity, timing, and integrity details so the signed file can be reviewed later with less ambiguity.
Signer authentication:
Timestamp capture:
Document hashing:
Tamper sealing:
Event logging:
Audit export:
Pricing and plan features
Pricing below reflects verified entry-tier data and plan notes from the provided ground truth.
| 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, Business Premium | Yes, higher tiers | Yes, higher tiers | Yes, higher tiers | Yes, higher tiers |
| Audit trail | Included | Included | Included | Included | Included |
| HIPAA compliance | BAA required | BAA available | BAA available | Not verified | Not verified |
Key performance indicators that demonstrate SignNow's proven track record.