FeaturesSign, send, track, and securely store documents using any device. No training or downloads required.See all features
SolutionsairSlate SignNow empowers organizations to speed up document processes, reduce errors, and improve collaboration.See all solutions
IntegrationsIntegrate airSlate SignNow with the apps you use and love.See all integrations
DevelopersEmbed eSignatures into your document workflows. Get 250 free signature invites.Learn more about API
PricingContact salesFree trial
PricingSupportRequest a demo

Digital Signature PHP for Secure Signatures

  • Quick to start
  • Easy-to-use
  • 24/7 support

No credit card required
E-signature frame illustration

Award-winning eSignature solution

What digital signature php means

Digital signature php refers to using SignNow to create, send, and manage electronic signatures in a PHP-based workflow or application. The platform supports document preparation, signer routing, audit trails, and completed records that help U.S. businesses document consent and intent. In practice, the sender uploads a file, adds signature fields, and routes it to recipients. Signers review and sign online or on mobile, and the system records timestamps, identity details, and the final executed document for evidence and retention.

Signer authentication and certificates

PKI:

PKI-based identity

X.509:

X.509 certificate binding

SMS OTP:

SMS OTP verification

ID verification:

ID document checks

2FA:

Two-factor signing

OCSP and CRL:

Certificate status checks
be ready to get more
Get legally-binding signatures now!
  • 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.

Recommended setup for digital signature php

A clear configuration helps align signer identity, evidentiary records, and retention with U.S. compliance requirements.

SettingRecommendation
Authentication methodSMS OTP or ID verification
Signature typeSES with stronger options as needed
Audit trailEnable full event logging
Document retention6 years for HIPAA records
EncryptionTLS 1.2/1.3 and AES-256

Quick steps for digital signature php

Use a simple sequence to prepare, route, and complete a document signing flow with SignNow.

  • Prepare:

    Upload the document and place signature fields.
  • Route:

    Add recipients and set signing order.
  • Track:

    Send the request and monitor completion.
  • Archive:

    Store the executed file and audit trail.

How digital signature php works

The signing flow starts with document preparation and ends with a completed record that includes signer activity and an audit trail.

  • Set up: Create the document and define signing fields.
  • Send: Assign recipients and capture their intent.
  • Sign: Collect signatures and log each action.
  • Complete: Finalize the file with an audit record.

Inside the SignNow audit trail

Audit logs record identity, timing, and document integrity details that support non-repudiation and evidence review.

01

Authenticate:

Record the signer identity, authentication method, and related access details.
02

Timestamp:

Capture UTC timestamps for each signing event and document action.
03

Hash:

Hash the document so later changes break verification.
04

Seal:

Seal the file with tamper-evident cryptographic records.
05

Log:

Store the action log with signer data and event sequence.
06

Export:

Export the audit trail for review or litigation support.

Documents and teams using digital signature php

Legal

Legal teams use signed contracts, NDAs, and approvals with role-based routing and stored records for review.

Operations

Operations teams complete invoices, consent forms, and internal requests while keeping document history and signer intent visible.

Users, roles, and permissions

  • Admins in SignNow accounts manage templates, permissions, and delegated sending so teams can standardize approved document flows without exposing unnecessary fields or recipients to every user. Shared templates reduce setup work across departments, while role-based access keeps document control aligned with internal approval rules and IT oversight.
  • Managers and coordinators use shared template libraries and controlled send permissions to route agreements, HR forms, and approvals through the right signers. SignNow supports delegated sending and account administration, which helps teams keep ownership clear while letting individual contributors prepare documents and route them under policy.

Connected workflows with SignNow

Connections with CRM, ERP, cloud storage, and project systems move documents into existing records without rekeying or manual file chasing.

Salesforce
Procore
Zapier
Microsoft Teams
Hub spot
Box
Microsoft

Pricing and features across vendors

Verified pricing and plan details help compare SignNow with major eSignature vendors using current annual-billing data.

FeaturesPlan / FeatureSignNowDocuSignAdobe SignPandaDocHelloSign
Starting price$8/user/mo, Business$15/user/mo, est.$14/user/mo, est.$19/user/mo, est.$15/user/mo, est.
Free trial7 daysNot verifiedNot verifiedNot verifiedNot verified
Bulk sendBusiness PremiumNot verifiedNot verifiedNot verifiedNot verified
Audit trailIncludedIncludedIncludedIncludedIncluded
HIPAA complianceBAA requiredNot verifiedNot verifiedNot verifiedNot verified

Troubleshooting digital signature php

These answers focus on signNow features, plan limits, and compliance requirements that affect document signing and recordkeeping.

SignNow Business supports legally binding eSignatures, audit trails, templates, and mobile apps. If a signer cannot complete a document, confirm the recipient address, resend the invite, and verify whether the workflow uses Business Premium features such as bulk send or kiosk mode. For HIPAA use, a BAA is required.

SignNow records timestamps, document history, and signer activity to support ESIGN and UETA evidence. If the audit trail seems incomplete, check whether the document was finalized in the same account and whether all signing events were completed before export. Enterprise and Site License plans add stronger administration options.

HIPAA workflows require a signed BAA and access controls that protect PHI under 45 CFR 164.312. SignNow supports HIPAA compliance when the customer uses the right agreement and process, but the platform alone does not remove the need for internal privacy controls and retention discipline.

Bulk send is included in the Business Premium plan. If the option is missing, confirm the subscription tier and the account role. Site License customers can use API and SSO options, while Business customers keep standard sending, templates, and mobile signing.

Document retention should follow the governing rule for that record type. For example, HIPAA signed records must be kept for 6 years under 45 CFR 164.530(j)(2). SignNow stores audit history, but the customer remains responsible for retention policy and secure archival.

For regulated workflows, SignNow supports security controls such as TLS 1.2/1.3 in transit, AES-256 at rest, SOC 2 Type II, ISO 27001, and 21 CFR Part 11 support. If a signer needs stronger verification, use SMS OTP, ID verification, or other configured authentication methods.

ROI at a Glance

Key performance indicators that demonstrate SignNow's proven track record.

28M+Documents signed
13+Years in business
4.6/5Average G2 rating
Download signNow app
4.7 / 5 rating on