Subcontractor agreements, lien waivers, change orders, and bid contracts — signed on any device, from any jobsite, in real time. No delays waiting for paper to travel between offices.
Free plan available · No credit card required · ESIGN Act compliant
Built-in features that save time and close deals faster.
Change orders are the source of most construction disputes. Zignature lets project managers send and collect change order approvals from owners and subcontractors in real time — before the work starts. Every change is documented with a timestamped signature, eliminating 'I never approved that' disputes.
Collect conditional lien waivers from subcontractors and suppliers at the time of payment issuance, and unconditional waivers upon payment receipt — all digitally. Zignature includes state-specific lien waiver templates for all 50 states. No more chasing paper waivers before closing out a project.
Award bids and collect signed subcontract agreements the same day — before crews mobilize. Zignature's bulk send lets you distribute the same subcontract form to multiple subs simultaneously. Integration with Procore and Buildertrend keeps your project management system updated automatically.
From simple agreements to complex multi-party workflows.
Execute subcontracts the day of bid award. Subcontractors sign from their truck on a phone — before crews mobilize.
Conditional and unconditional lien waivers from every sub and supplier — all 50 state templates included, collected at payment time.
Owner and GC approvals before any out-of-scope work begins. Every change timestamped and documented in your project file.
AIA A101, A201, and custom GC-Sub agreements with multi-party signing and notarization support for public works projects.
Toolbox talk sign-in sheets, site safety plans, and OSHA training acknowledgments — collected digitally at the jobsite.
Signed proposals and bid bonds delivered to owners before bid deadline, with time-stamped proof of submission.
No training required. Send your first document today.
Drag and drop any PDF, Word doc, or upload from Google Drive, Dropbox, or OneDrive.
Place signature, date, initials, and text fields. Assign each field to the right signer in seconds.
Recipients get a branded email and sign from any device — no account needed. Track opens and completions in real time.
Every signer receives a completed PDF with a tamper-proof audit trail. Automatically stored and searchable.
Join construction companies that have eliminated paper contracts. Free plan available.
Everything you need to know.
Yes. Zignature is fully mobile-optimized. Subcontractors receive a signing link via email or SMS and sign from any smartphone — iPhone or Android — without downloading an app. The signing experience works perfectly on a touchscreen, including drawing a signature with a finger.
Yes. Zignature includes state-specific conditional and unconditional lien waiver templates for all 50 states, formatted in accordance with each state's statutory requirements. Templates are pre-built and ready to use — no legal review required for standard forms.
Zignature connects to Procore, Buildertrend, and other construction management platforms via Zapier and REST API. You can trigger subcontract sends from Procore bid awards, auto-upload signed contracts to your project folder, and sync completion status to the project record.
Every Zignature-signed change order includes a timestamped Certificate of Completion with signer identity, IP address, and geolocation — providing undeniable proof that the change was authorized before work began. This documentation is accepted in AIA arbitration and civil litigation.
Yes. Zignature's bulk send feature lets you upload a CSV of subcontractors and send lien waiver requests to all of them simultaneously with one click. Non-signers receive automatic reminders. You see a real-time dashboard of who has signed and who hasn't.
For contracts requiring notarization, Zignature integrates with Remote Online Notarization (RON) providers. You can complete the electronic signature and notarization in a single workflow, with the notarized document stored in your Zignature account.
All signed documents remain in your Zignature account indefinitely. You can export project document archives as a zip file containing all signed PDFs and audit trails — useful for project closeout packages and warranty documentation.
Zignature can be used for most union labor documents that are legally permissible for electronic execution. Some collective bargaining agreements may have specific requirements — consult with your labor counsel to confirm electronic execution is permissible for your specific agreement type.